AWR報告實例分析講解

WORKLOAD REPOSITORY report for

DB Name	DB Id	Instance	Inst num	Release	RAC	Host
ICCI	1314098396	ICCI1	1	10.2.0.3.0	YES	HPGICCI1

 

 

	Snap Id	Snap Time	Sessions	Cursors/Session
Begin Snap:	2678	25-Dec-08 14:04:50	24	1.5
End Snap:	2680	25-Dec-08 15:23:37	26	1.5
Elapsed:		78.79 (mins)
DB Time:		11.05 (mins)

Elapsed表示整個AWR報表統計的時間長度

DB Time是記錄在服務器花在數據庫運算（非后台進程）和等待（非空閑等待）上的時間

DB Time=cpu time+wait time（不包含空閑等待）（非后台進程）

DB Time不包括Oracle后台進程消耗的時間。如果DB Time遠遠小於Elapsed時間，說明數據庫比較空閑。

上述報表中

Snapshot時間間隔約為79分鍾，cpu就公有8*79=632分鍾。DB Time為11.05分鍾，則：cpu花費了11.05分鍾在處理oracle非空閑等待和運算上（比如邏輯讀），也就是說cpu有11.05/632=0.017%花費在處理oracle的操作上。

 

從awr report的Elapsed time和DB Time就能大概了解db的負載，計算公式可參考為：cpu負載=DB Time/(cpu數*Elapsed)*100%

 

在79分鍾里（其間收集了3次快照數據），數據庫耗時11分鍾，RDA數據中顯示系統有8個邏輯CPU（4個物理CPU），平均每個CPU耗時1.4分鍾，CPU利用率只有大約2%（1.4/79）。說明系統壓力非常小。

可是對於批量系統，數據庫的工作負載總是集中在一段時間內。如果快照周期不在這一段時間內，或者快照周期跨度太長而包含了大量的數據庫空閑時間，所得出的分析結果是沒有意義的。這也說明選擇分析時間段很關鍵，要選擇能夠代表性能問題的時間段。

 

Report Summary

Cache Sizes

	Begin	End
Buffer Cache:	3,344M	3,344M	Std Block Size:	8K
Shared Pool Size:	704M	704M	Log Buffer:	14,352K

顯示SGA中每個區域的大小（在AMM改變它們之后），可用來與初始參數值比較。

shared pool主要包括library cache和dictionary cache。library cache用來存儲最近解析（或編譯）后SQL、PL/SQL和Java classes等。library cache用來存儲最近引用的數據字典。發生在library cache或dictionary cache的cache miss代價要比發生在buffer cache的代價高得多。因此shared pool的設置要確保最近使用的數據都能被cache。

 

Load Profile

	Per Second	Per Transaction
DB Time（s）	2.4	0.0
Redo size:	918,805.72	775,912.72
Logical reads:	3,521.77	2,974.06
Block changes:	1,817.95	1,535.22
Physical reads:	68.26	57.64
Physical writes:	362.59	306.20
User calls:	326.69	275.88
Parses:	38.66	32.65
Hard parses:	0.03	0.03
Sorts:	0.61	0.51
Logons:	0.01	0.01
Executes:	354.34	299.23
Transactions:	1.18

 

% Blocks changed per Read:	51.62	Recursive Call %:	51.72
Rollback per transaction %:	85.49	Rows per Sort:	########

顯示數據庫負載概況，將之與基線數據比較才具有更多的意義，如果每秒或每事務的負載變化不大，說明應用運行比較穩定。單個的報告數據只說明應用的負載情況，絕大多數據並沒有一個所謂“正確”的值，然而Logons大於每秒1~2個、Hard parses大於每秒100、全部parses超過每秒300表明可能有爭用問題。

DB Time（s）：每秒內用於DB處理的時間，其他時間為等待時間

Redo size：每秒/每事務產生的redo大小（單位字節），可標志數據庫任務的繁重程序。其中Per Second表示每秒中產生的redo的字節數，Per Transaction表示每個事務產生的redo的字節數，可以通過后者可以看到事務的大小，協助判斷是否commit次數太多。例如per second很大，而per transaction很小，說明commit次數太多。通常在很繁忙的系統中日志生成量可能達到上百k，甚至幾百k。

Logical reads：每秒/每事務邏輯讀的塊數（我們可以這樣認為，block在內存中，我們每一次讀一塊內存，就相當於一次邏輯讀），單位為塊，在良好的OLTP環境中，Logical reads/Executes不會超過50，一般只有10左右，如果該指標較大，表示語句可能不夠優化，需要具體分析，在該示例中，3,521.77/354.34,那么在OLAP中呢？

Block changes：每秒/每事務修改的塊數，即每秒中多少個塊發生變化

Physical reads：每秒/每事務物理讀的塊數，即每秒數據庫從磁盤讀取的塊個數

Physical writes：每秒/每事務物理寫的塊數，即每秒有多少個塊接受了數據庫寫入數據。

User calls：每秒/每事務用戶call次數User calls/Executes基本代表每個語句的請求次數，Executes越接近User calls越好。

Parses：每秒的SQL語句解析的次數，超過300即需要關注，可以考慮調整參數session_cursor_cache來改善解析次數過高的現象。

Hard parses：其中硬解析的次數，如果硬解析次數太高，說明SQL重用率不高。例如超過100，基本都是由於不使用bind var所導致的，導致cpu使用率的問題，極有使得性能急劇下降。

Sorts：每秒/每事務的排序次數

Logons：每秒/每事務登錄的次數

Executes：每秒/每事務SQL執行次數，包括用戶執行的sql語句與系統執行的sql語句，表示一個系統sql的繁忙程度。

Transactions：每秒產生的事物個數，反映數據庫負載程度，不同的系統，略有差異，在典型的交易系統中，事務較多，而網站系統，可能select查詢較多。

Blocks changed per Read：表示邏輯讀用於修改數據塊的比例

Recursive Call：遞歸調用占所有操作的比率

Rollback per transaction：每事務的回滾率

Rollbacks：表示數據庫中事務的回退率，如果不是因為業務本身的原因，通常應該小於10%為好，回退是一個很消耗資源的操作。

Rows per Sort：每次排序的行數

注:

Oracle的硬解析和軟解析

　　提到軟解析(soft parse)和硬解析(hard parse)，就不能不說一下Oracle對sql的處理過程。當你發出一條sql語句交付Oracle，在執行和獲取結果前，Oracle對此sql將進行幾個步驟的處理過程：

　　1、語法檢查(syntax check)

　　檢查此sql的拼寫是否語法。

　　2、語義檢查(semantic check)

　　諸如檢查sql語句中的訪問對象是否存在及該用戶是否具備相應的權限。

　　3、對sql語句進行解析(parse)

　　利用內部算法對sql進行解析，生成解析樹(parse tree)及執行計划(execution plan)。

　　4、執行sql，返回結果(execute and return)

　　其中，軟、硬解析就發生在第三個過程里。

　　Oracle利用內部的hash算法來取得該sql的hash值，然后在library cache里查找是否存在該hash值；

　　假設存在，則將此sql與cache中的進行比較；

　　假設“相同”，就將利用已有的解析樹與執行計划，而省略了優化器的相關工作。這也就是軟解析的過程。

　　誠然，如果上面的2個假設中任有一個不成立，那么優化器都將進行創建解析樹、生成執行計划的動作。這個過程就叫硬解析。

　　創建解析樹、生成執行計划對於sql的執行來說是開銷昂貴的動作，所以，應當極力避免硬解析，盡量使用軟解析。

Instance Efficiency Percentages (Target 100%)

Buffer Nowait %:	100.00	Redo NoWait %:	100.00
Buffer Hit %:	98.72	In-memory Sort %:	99.86
Library Hit %:	99.97	Soft Parse %:	99.92
Execute to Parse %:	89.09	Latch Hit %:	99.99
Parse CPU to Parse Elapsd %:	7.99	% Non-Parse CPU:	99.95

本節包含了Oracle關鍵指標的內存命中率及其它數據庫實例操作的效率。其中Buffer Hit Ratio 也稱Cache Hit Ratio，Library Hit ratio也稱Library Cache Hit ratio。同Load Profile一節相同，這一節也沒有所謂“正確”的值，而只能根據應用的特點判斷是否合適。在一個使用直接讀執行大型並行查詢的DSS環境，20%的Buffer Hit Ratio是可以接受的，而這個值對於一個OLTP系統是完全不能接受的。根據Oracle的經驗，對於OLTPT系統，Buffer Hit Ratio理想應該在90%以上。

Buffer Nowait%表示在數據緩沖區中獲取的buffer時，未進行等待的比率，越高越好。

buffer hit%表示進程從內存中找到數據塊的比率，監視這個值是否發生重大變化比這個值本身更重要。對於一般的OLTP系統，命中率通常在95@以上，如果此值低於80%，應該給數據庫分配更多的內存，考慮加大db_cache_size。在數據倉庫OLAP環境中，數據緩沖命中率不是一個重要的指標，因為OLAP數據庫主要是物理讀，甚至是直接讀，該命中率不可能高。

Redo NoWai%t表示在LOG緩沖區獲得BUFFER的未等待比例。如果太低（可參考90%閥值），考慮增加LOG BUFFER。

library hit%表示Oracle從Library Cache中檢索到一個解析過的SQL或PL/SQL語句的比率，當應用程序調用SQL或存儲過程時，Oracle檢查Library Cache確定是否存在解析過的版本，如果存在，Oracle立即執行語句；如果不存在，Oracle解析此語句，並在Library Cache中為它分配共享SQL區。低的library hit ratio會導致過多的解析，增加CPU消耗，降低性能。Sql語句在庫緩沖中能否找到相應的解析計划，如果library hit ratio低於90%，可能需要調大shared pool區，或檢查是否有硬編碼現象。

Latch Hit%：Latch是一種保護內存結構的鎖，可以認為是SERVER進程獲取訪問內存數據結構的許可,表示內部結構維護鎖命中率。要確保Latch Hit>99%，否則意味着Shared Pool latch爭用，可能由於未共享的SQL，或者Library Cache太小，可使用綁定變更或調大Shared Pool解決。

Parse CPU to Parse Elapsd：表示解析實際運行時間/(解析實際運行時間+解析中等待資源時間)，越高越好。在實際繁忙的系統中，該值可能因為等待資源而不會太高。

Non-Parse CPU ：SQL實際運行時間/(SQL實際運行時間+SQL解析時間)，太低表示解析消耗時間過多。說明解析時間所占比率過高，需要考慮提高sql語句重用性。

Execute to Parse：是語句執行與分析的比例,表示sql語句解析后被重復執行的命中率，計算公式=100*（1-Parses/Executions）,如果該值偏小，說明分析（硬分析和軟分析）的比例較大，快速分析較少，根據實際情況，可以考慮調整session_cached_cursors參數，有些報告中這個值是負的，看上去很奇怪，事實上這表示一個問題，sql如果被age out的話就可能出現這種情況 ，也就是sql老化，執行alter system flush shared_pool

如果要SQL重用率高，則這個比例會很高。該值越高表示一次解析后被重復執行的次數越多。

  Soft Parse%：SQL語句軟解析占整個分析的命中率，如果低於95，需檢查是否有硬編碼現象，如果低於80，說明sql語句基本沒有重用性=soft/(soft+hard)

In-memory Sort：在內存中排序的比率，即有多少排序在內存中進行的，如果過低說明有大量的排序在臨時表空間中進行，性能肯定不好，考慮調大PGA參數，sort_area_size。

Soft Parse：軟解析的百分比（softs/softs+hards），近似當作sql在共享區的命中率，太低則需要調整應用使用綁定變量。

Shared Pool Statistics

	Begin	End
Memory Usage %:	47.19	47.50
% SQL with executions>1:	88.48	79.81
% Memory for SQL w/exec>1:	79.99	73.52

Memory Usage %：表示共享池內存使用率，對於一個已經運行一段時間的數據庫來說，共享池內存使用率，應該穩定在75%-90%間，如果太小，說明Shared Pool有浪費，而如果高於90，說明共享池中有爭用，內存不足。

SQL with executions>1：執行次數大於1的sql比率，如果此值太小的話要結合Parse，看看是不是硬編碼現象，說明需要在應用中更多使用綁定變量，避免過多SQL解析。

Memory for SQL w/exec>1：執行次數大於1的SQL消耗內存的占比。

Top 5 Timed Events

Event	Waits	Time(s)	Avg Wait(ms)	% Total Call Time	Wait Class
CPU time		515		77.6
SQL*Net more data from client	27,319	64	2	9.7	Network
log file parallel write	5,497	47	9	7.1	System I/O
db file sequential read	7,900	35	4	5.3	User I/O
db file parallel write	4,806	34	7	5.1	System I/O

這是報告概要的最后一節，顯示了系統中最嚴重的5個等待，按所占等待時間的比例倒序列示。當我們調優時，總希望觀察到最顯著的效果，因此應當從這里入手確定我們下一步做什么。例如如果‘buffer busy wait’是較嚴重的等待事件，我們應當繼續研究報告中Buffer Wait和File/Tablespace IO區的內容，識別哪些文件導致了問題。如果最嚴重的等待事件是I/O事件，我們應當研究按物理讀排序的SQL語句區以識別哪些語句在執行大量I/O，並研究Tablespace和I/O區觀察較慢響應時間的文件。如果有較高的LATCH等待，就需要察看詳細的LATCH統計識別哪些LATCH產生的問題。

在這里，log file parallel write是相對比較多的等待，占用了7%的CPU時間。

通常，在沒有問題的數據庫中，CPU time總是列在第一個。

更多的等待事件，參見本報告 的Wait Events一節。

 

RAC Statistics

	Begin	End
Number of Instances:	2	2

Global Cache Load Profile

	Per Second	Per Transaction
Global Cache blocks received:	4.16	3.51
Global Cache blocks served:	5.97	5.04
GCS/GES messages received:	408.47	344.95
GCS/GES messages sent:	258.03	217.90
DBWR Fusion writes:	0.05	0.05
Estd Interconnect traffic (KB)	211.16

Global Cache Efficiency Percentages (Target local+remote 100%)

Buffer access - local cache %:	98.60
Buffer access - remote cache %:	0.12
Buffer access - disk %:	1.28

Global Cache and Enqueue Services - Workload Characteristics

Avg global enqueue get time (ms):	0.1
Avg global cache cr block receive time (ms):	1.1
Avg global cache current block receive time (ms):	0.8
Avg global cache cr block build time (ms):	0.0
Avg global cache cr block send time (ms):	0.0
Global cache log flushes for cr blocks served %:	3.5
Avg global cache cr block flush time (ms):	3.9
Avg global cache current block pin time (ms):	0.0
Avg global cache current block send time (ms):	0.0
Global cache log flushes for current blocks served %:	0.4
Avg global cache current block flush time (ms):	3.0

Global Cache and Enqueue Services - Messaging Statistics

Avg message sent queue time (ms):	0.0
Avg message sent queue time on ksxp (ms):	0.3
Avg message received queue time (ms):	0.5
Avg GCS message process time (ms):	0.0
Avg GES message process time (ms):	0.0
% of direct sent messages:	14.40
% of indirect sent messages:	77.04
% of flow controlled messages:	8.56

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Main Report

• Wait Events Statistics
• SQL Statistics
• Instance Activity Statistics
• IO Stats
• Buffer Pool Statistics
• Advisory Statistics
• Wait Statistics
• Undo Statistics
• Latch Statistics
• Segment Statistics
• Dictionary Cache Statistics
• Library Cache Statistics
• Memory Statistics
• Streams Statistics
• Resource Limit Statistics
• init.ora Parameters

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Wait Events Statistics

• Time Model Statistics
• Wait Class
• Wait Events
• Background Wait Events
• Operating System Statistics
• Service Statistics
• Service Wait Class Stats

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Time Model Statistics

• Total time in database user-calls (DB Time): 663s
• Statistics including the word "background" measure background process time, and so do not contribute to the DB time statistic
• Ordered by % or DB time desc, Statistic name

Statistic Name	Time (s)	% of DB Time
DB CPU	514.50	77.61
sql execute elapsed time	482.27	72.74
parse time elapsed	3.76	0.57
PL/SQL execution elapsed time	0.50	0.08
hard parse elapsed time	0.34	0.05
connection management call elapsed time	0.08	0.01
hard parse (sharing criteria) elapsed time	0.00	0.00
repeated bind elapsed time	0.00	0.00
PL/SQL compilation elapsed time	0.00	0.00
failed parse elapsed time	0.00	0.00
DB time	662.97
background elapsed time	185.19
background cpu time	67.48

此節顯示了各種類型的數據庫處理任務所占用的CPU時間。

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Wait Class

• s - second
• cs - centisecond - 100th of a second
• ms - millisecond - 1000th of a second
• us - microsecond - 1000000th of a second
• ordered by wait time desc, waits desc

Wait Class	Waits	%Time -outs	Total Wait Time (s)	Avg wait (ms)	Waits /txn
User I/O	66,837	0.00	120	2	11.94
System I/O	28,295	0.00	93	3	5.05
Network	1,571,450	0.00	66	0	280.72
Cluster	210,548	0.00	29	0	37.61
Other	81,783	71.82	28	0	14.61
Application	333,155	0.00	16	0	59.51
Concurrency	5,182	0.04	5	1	0.93
Commit	919	0.00	4	4	0.16
Configuration	25,427	99.46	1	0	4.54

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Wait Events

• s - second
• cs - centisecond - 100th of a second
• ms - millisecond - 1000th of a second
• us - microsecond - 1000000th of a second
• ordered by wait time desc, waits desc (idle events last)

Event	Waits	%Time -outs	Total Wait Time (s)	Avg wait (ms)	Waits /txn
SQL*Net more data from client	27,319	0.00	64	2	4.88
log file parallel write	5,497	0.00	47	9	0.98
db file sequential read	7,900	0.00	35	4	1.41
db file parallel write	4,806	0.00	34	7	0.86
db file scattered read	10,310	0.00	31	3	1.84
direct path write	42,724	0.00	30	1	7.63
reliable message	355	2.82	18	49	0.06
SQL*Net break/reset to client	333,084	0.00	16	0	59.50
db file parallel read	3,732	0.00	13	4	0.67
gc current multi block request	175,710	0.00	10	0	31.39
control file sequential read	15,974	0.00	10	1	2.85
direct path read temp	1,873	0.00	9	5	0.33
gc cr multi block request	20,877	0.00	8	0	3.73
log file sync	919	0.00	4	4	0.16
gc cr block busy	526	0.00	3	6	0.09
enq: FB - contention	10,384	0.00	3	0	1.85
DFS lock handle	3,517	0.00	3	1	0.63
control file parallel write	1,946	0.00	3	1	0.35
gc current block 2-way	4,165	0.00	2	0	0.74
library cache lock	432	0.00	2	4	0.08
name-service call wait	22	0.00	2	76	0.00
row cache lock	3,894	0.00	2	0	0.70
gcs log flush sync	1,259	42.02	2	1	0.22
os thread startup	18	5.56	2	89	0.00
gc cr block 2-way	3,671	0.00	2	0	0.66
gc current block busy	113	0.00	1	12	0.02
SQL*Net message to client	1,544,115	0.00	1	0	275.83
gc buffer busy	15	6.67	1	70	0.00
gc cr disk read	3,272	0.00	1	0	0.58
direct path write temp	159	0.00	1	5	0.03
gc current grant busy	898	0.00	1	1	0.16
log file switch completion	29	0.00	1	17	0.01
CGS wait for IPC msg	48,739	99.87	0	0	8.71
gc current grant 2-way	1,142	0.00	0	0	0.20
kjbdrmcvtq lmon drm quiesce: ping completion	9	0.00	0	19	0.00
enq: US - contention	567	0.00	0	0	0.10
direct path read	138	0.00	0	1	0.02
enq: WF - contention	14	0.00	0	9	0.00
ksxr poll remote instances	13,291	58.45	0	0	2.37
library cache pin	211	0.00	0	1	0.04
ges global resource directory to be frozen	9	100.00	0	10	0.00
wait for scn ack	583	0.00	0	0	0.10
log file sequential read	36	0.00	0	2	0.01
undo segment extension	25,342	99.79	0	0	4.53
rdbms ipc reply	279	0.00	0	0	0.05
ktfbtgex	6	100.00	0	10	0.00
enq: HW - contention	44	0.00	0	1	0.01
gc cr grant 2-way	158	0.00	0	0	0.03
enq: TX - index contention	1	0.00	0	34	0.00
enq: CF - contention	64	0.00	0	1	0.01
PX Deq: Signal ACK	37	21.62	0	1	0.01
latch free	3	0.00	0	10	0.00
buffer busy waits	625	0.16	0	0	0.11
KJC: Wait for msg sends to complete	154	0.00	0	0	0.03
log buffer space	11	0.00	0	2	0.00
enq: PS - contention	46	0.00	0	1	0.01
enq: TM - contention	70	0.00	0	0	0.01
IPC send completion sync	40	100.00	0	0	0.01
PX Deq: reap credit	1,544	99.81	0	0	0.28
log file single write	36	0.00	0	0	0.01
enq: TT - contention	46	0.00	0	0	0.01
enq: TD - KTF dump entries	12	0.00	0	1	0.00
read by other session	1	0.00	0	12	0.00
LGWR wait for redo copy	540	0.00	0	0	0.10
PX Deq Credit: send blkd	17	5.88	0	0	0.00
enq: TA - contention	14	0.00	0	0	0.00
latch: ges resource hash list	44	0.00	0	0	0.01
enq: PI - contention	8	0.00	0	0	0.00
write complete waits	1	0.00	0	2	0.00
enq: DR - contention	3	0.00	0	0	0.00
enq: MW - contention	3	0.00	0	0	0.00
enq: TS - contention	3	0.00	0	0	0.00
PX qref latch	150	100.00	0	0	0.03
enq: MD - contention	2	0.00	0	0	0.00
latch: KCL gc element parent latch	11	0.00	0	0	0.00
enq: JS - job run lock - synchronize	1	0.00	0	1	0.00
SQL*Net more data to client	16	0.00	0	0	0.00
latch: cache buffers lru chain	1	0.00	0	0	0.00
enq: UL - contention	1	0.00	0	0	0.00
gc current split	1	0.00	0	0	0.00
enq: AF - task serialization	1	0.00	0	0	0.00
latch: object queue header operation	3	0.00	0	0	0.00
latch: cache buffers chains	1	0.00	0	0	0.00
latch: enqueue hash chains	2	0.00	0	0	0.00
SQL*Net message from client	1,544,113	0.00	12,626	8	275.83
gcs remote message	634,884	98.64	9,203	14	113.41
DIAG idle wait	23,628	0.00	4,616	195	4.22
ges remote message	149,591	93.45	4,612	31	26.72
Streams AQ: qmn slave idle wait	167	0.00	4,611	27611	0.03
Streams AQ: qmn coordinator idle wait	351	47.86	4,611	13137	0.06
Streams AQ: waiting for messages in the queue	488	100.00	4,605	9436	0.09
virtual circuit status	157	100.00	4,596	29272	0.03
PX Idle Wait	1,072	97.11	2,581	2407	0.19
jobq slave wait	145	97.93	420	2896	0.03
Streams AQ: waiting for time management or cleanup tasks	1	100.00	270	269747	0.00
PX Deq: Parse Reply	40	40.00	0	3	0.01
PX Deq: Execution Msg	121	26.45	0	0	0.02
PX Deq: Join ACK	38	42.11	0	1	0.01
PX Deq: Execute Reply	34	32.35	0	0	0.01
PX Deq: Msg Fragment	16	0.00	0	0	0.00
Streams AQ: RAC qmn coordinator idle wait	351	100.00	0	0	0.06
class slave wait	2	0.00	0	0	0.00

db file scattered read等待事件是當SESSION等待multi-block I/O時發生的，通過是由於full table scans或 index fast full scans。發生過多讀操作的Segments可以在“Segments by Physical Reads”和 “SQL ordered by Reads”節中識別（在其它版本的報告中，可能是別的名稱）。如果在OLTP應用中，不應該有過多的全掃描操作，而應使用選擇性好的索引操作。

DB file sequential read等待意味着發生順序I/O讀等待（通常是單塊讀取到連續的內存區域中），如果這個等待非常嚴重，應該使用上一段的方法確定執行讀操作的熱點SEGMENT，然后通過對大表進行分區以減少I/O量，或者優化執行計划（通過使用存儲大綱或執行數據分析）以避免單塊讀操作引起的sequential read等待。通過在批量應用中，DB file sequential read是很影響性能的事件，總是應當設法避免。

Log File Parallel Write事件是在等待LGWR進程將REDO記錄從LOG 緩沖區寫到聯機日志文件時發生的。雖然寫操作可能是並發的，但LGWR需要等待最后的I/O寫到磁盤上才能認為並行寫的完成，因此等待時間依賴於OS完成所有請求的時間。如果這個等待比較嚴重，可以通過將LOG文件移到更快的磁盤上或者條帶化磁盤（減少爭用）而降低這個等待。

Buffer Busy Waits事件是在一個SESSION需要訪問BUFFER CACHE中的一個數據庫塊而又不能訪問時發生的。緩沖區“busy”的兩個原因是：1）另一個SESSION正在將數據塊讀進BUFFER。2）另一個SESSION正在以排它模式占用着這塊被請求的BUFFER。可以在“Segments by Buffer Busy Waits”一節中找出發生這種等待的SEGMENT，然后通過使用reverse-key indexes並對熱表進行分區而減少這種等待事件。

Log File Sync事件，當用戶SESSION執行事務操作（COMMIT或ROLLBACK等）后，會通知 LGWR進程將所需要的所有REDO信息從LOG BUFFER寫到LOG文件，在用戶SESSION等待LGWR返回安全寫入磁盤的通知時發生此等待。減少此等待的方法寫Log File Parallel Write事件的處理。

Enqueue Waits是串行訪問本地資源的本鎖，表明正在等待一個被其它SESSION（一個或多個）以排它模式鎖住的資源。減少這種等待的方法依賴於生產等待的鎖類型。導致Enqueue等待的主要鎖類型有三種：TX（事務鎖）, TM D（ML鎖）和ST（空間管理鎖）。

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Background Wait Events

• ordered by wait time desc, waits desc (idle events last)

Event	Waits	%Time -outs	Total Wait Time (s)	Avg wait (ms)	Waits /txn
log file parallel write	5,497	0.00	47	9	0.98
db file parallel write	4,806	0.00	34	7	0.86
events in waitclass Other	69,002	83.25	22	0	12.33
control file sequential read	9,323	0.00	7	1	1.67
control file parallel write	1,946	0.00	3	1	0.35
os thread startup	18	5.56	2	89	0.00
direct path read	138	0.00	0	1	0.02
db file sequential read	21	0.00	0	5	0.00
direct path write	138	0.00	0	0	0.02
log file sequential read	36	0.00	0	2	0.01
gc cr block 2-way	96	0.00	0	0	0.02
gc current block 2-way	78	0.00	0	0	0.01
log buffer space	11	0.00	0	2	0.00
row cache lock	59	0.00	0	0	0.01
log file single write	36	0.00	0	0	0.01
buffer busy waits	151	0.66	0	0	0.03
gc current grant busy	29	0.00	0	0	0.01
library cache lock	4	0.00	0	1	0.00
enq: TM - contention	10	0.00	0	0	0.00
gc current grant 2-way	8	0.00	0	0	0.00
gc cr multi block request	7	0.00	0	0	0.00
gc cr grant 2-way	5	0.00	0	0	0.00
rdbms ipc message	97,288	73.77	50,194	516	17.38
gcs remote message	634,886	98.64	9,203	14	113.41
DIAG idle wait	23,628	0.00	4,616	195	4.22
pmon timer	1,621	100.00	4,615	2847	0.29
ges remote message	149,591	93.45	4,612	31	26.72
Streams AQ: qmn slave idle wait	167	0.00	4,611	27611	0.03
Streams AQ: qmn coordinator idle wait	351	47.86	4,611	13137	0.06
smon timer	277	6.50	4,531	16356	0.05
Streams AQ: waiting for time management or cleanup tasks	1	100.00	270	269747	0.00
PX Deq: Parse Reply	40	40.00	0	3	0.01
PX Deq: Join ACK	38	42.11	0	1	0.01
PX Deq: Execute Reply	34	32.35	0	0	0.01
Streams AQ: RAC qmn coordinator idle wait	351	100.00	0	0	0.06

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Operating System Statistics

Statistic	Total
NUM_LCPUS	0
NUM_VCPUS	0
AVG_BUSY_TIME	101,442
AVG_IDLE_TIME	371,241
AVG_IOWAIT_TIME	5,460
AVG_SYS_TIME	25,795
AVG_USER_TIME	75,510
BUSY_TIME	812,644
IDLE_TIME	2,971,077
IOWAIT_TIME	44,794
SYS_TIME	207,429
USER_TIME	605,215
LOAD	0
OS_CPU_WAIT_TIME	854,100
RSRC_MGR_CPU_WAIT_TIME	0
PHYSICAL_MEMORY_BYTES	8,589,934,592
NUM_CPUS	8
NUM_CPU_CORES	4

NUM_LCPUS：                  如果顯示0，是因為沒有設置LPARS

NUM_VCPUS：                    同上。

AVG_BUSY_TIME：           BUSY_TIME / NUM_CPUS

AVG_IDLE_TIME：             IDLE_TIME / NUM_CPUS

AVG_IOWAIT_TIME：       IOWAIT_TIME / NUM_CPUS

AVG_SYS_TIME：               SYS_TIME / NUM_CPUS

AVG_USER_TIME：            USER_TIME / NUM_CPUSar o

BUSY_TIME：                      time equiv of %usr+%sys in sar output

IDLE_TIME：                        time equiv of %idle in sar

IOWAIT_TIME：                  time equiv of %wio in sar

SYS_TIME：                          time equiv of %sys in sar

USER_TIME：                       time equiv of %usr in sar

LOAD：                                  未知

OS_CPU_WAIT_TIME：      supposedly time waiting on run queues

RSRC_MGR_CPU_WAIT_TIME：   time waited coz of resource manager

PHYSICAL_MEMORY_BYTES：    total memory in use supposedly

NUM_CPUS：                       number of CPUs reported by OS

NUM_CPU_CORES：          number of CPU sockets on motherboard

總的elapsed time也可以用以公式計算：

BUSY_TIME + IDLE_TIME + IOWAIT TIME

或：SYS_TIME + USER_TIME + IDLE_TIME + IOWAIT_TIME

 （因為BUSY_TIME = SYS_TIME+USER_TIME）

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Service Statistics

• ordered by DB Time

Service Name	DB Time (s)	DB CPU (s)	Physical Reads	Logical Reads
ICCI	608.10	496.60	315,849	16,550,972
SYS$USERS	54.70	17.80	6,539	58,929
ICCIXDB	0.00	0.00	0	0
SYS$BACKGROUND	0.00	0.00	282	38,990

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Service Wait Class Stats

• Wait Class info for services in the Service Statistics section.
• Total Waits and Time Waited displayed for the following wait classes: User I/O, Concurrency, Administrative, Network
• Time Waited (Wt Time) in centisecond (100th of a second)

Service Name	User I/O Total Wts	User I/O Wt Time	Concurcy Total Wts	Concurcy Wt Time	Admin Total Wts	Admin Wt Time	Network Total Wts	Network Wt Time
ICCI	59826	8640	4621	338	0	0	1564059	6552
SYS$USERS	6567	3238	231	11	0	0	7323	3
SYS$BACKGROUND	443	115	330	168	0	0	0	0

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SQL Statistics

• SQL ordered by Elapsed Time
• SQL ordered by CPU Time
• SQL ordered by Gets
• SQL ordered by Reads
• SQL ordered by Executions
• SQL ordered by Parse Calls
• SQL ordered by Sharable Memory
• SQL ordered by Version Count
• SQL ordered by Cluster Wait Time
• Complete List of SQL Text

本節按各種資源分別列出對資源消耗最嚴重的SQL語句，並顯示它們所占統計期內全部資源的比例，這給出我們調優指南。例如在一個系統中，CPU資源是系統性能瓶頸所在，那么優化buffer gets最多的SQL語句將獲得最大效果。在一個I/O等待是最嚴重事件的系統中，調優的目標應該是physical IOs最多的SQL語句。

在STATSPACK報告中，沒有完整的SQL語句，可使用報告中的Hash Value通過下面語句從數據庫中查到：

select sql_text

from stats$sqltext

where hash_value = &hash_value

order by piece;

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SQL ordered by Elapsed Time

• Resources reported for PL/SQL code includes the resources used by all SQL statements called by the code.
• % Total DB Time is the Elapsed Time of the SQL statement divided into the Total Database Time multiplied by 100

Elapsed Time (s)	CPU Time (s)	Executions	Elap per Exec (s)	% Total DB Time	SQL Id	SQL Module	SQL Text
93	57	1	93.50	14.10	d8z0u8hgj8xdy	cuidmain@HPGICCI1 (TNS V1-V3)	insert into CUID select CUID_...
76	75	172,329	0.00	11.52	4vja2k2gdtyup	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
58	42	1	58.04	8.75	569r5k05drsj7	cumimain@HPGICCI1 (TNS V1-V3)	insert into CUMI select CUSV_...
51	42	1	50.93	7.68	ackxqhnktxnbc	cusmmain@HPGICCI1 (TNS V1-V3)	insert into CUSM select CUSM_...
38	36	166,069	0.00	5.67	7gtztzv329wg0		select c.name, u.name from co...
35	3	1	35.00	5.28	6z06gcfw39pkd	SQL*Plus	SELECT F.TABLESPACE_NAME, TO_...
23	23	172,329	0.00	3.46	1dm3bq36vu3g8	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into iccifnsact values...
15	11	5	2.98	2.25	djs2w2f17nw2z		DECLARE job BINARY_INTEGER := ...
14	14	172,983	0.00	2.16	7wwv1ybs9zguz	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCIFNSACT set BORM_AD...
13	13	172,337	0.00	2.00	gmn2w09rdxn14	load_oldnewact@HPGICCI1 (TNS V1-V3)	insert into OLDNEWACT values ...
13	13	166,051	0.00	1.89	chjmy0dxf9mbj	icci_migact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
10	4	1	9.70	1.46	0yv9t4qb1zb2b	cuidmain@HPGICCI1 (TNS V1-V3)	select CUID_CUST_NO , CUID_ID_...
10	8	5	1.91	1.44	1crajpb7j5tyz		INSERT INTO STATS$SGA_TARGET_A...
8	8	172,329	0.00	1.25	38apjgr0p55ns	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCICCS set CCSMAXOVER...
8	8	172,983	0.00	1.16	5c4qu2zmj3gux	load_fnsact@HPGICCI1 (TNS V1-V3)	select * from ICCIPRODCODE wh...

記錄了執行總和時間的TOP SQL(請注意是監控范圍內該SQL的執行時間總和，而不是單次SQL執行時間 Elapsed Time = CPU Time + Wait Time)。

Elapsed Time(S): SQL語句執行用總時長，此排序就是按照這個字段進行的。注意該時間不是單個SQL跑的時間，而是監控范圍內SQL執行次數的總和時間。單位時間為秒。Elapsed Time = CPU Time + Wait Time

 CPU Time(s): 為SQL語句執行時CPU占用時間總時長，此時間會小於等於Elapsed Time時間。單位時間為秒。

 Executions: SQL語句在監控范圍內的執行次數總計。

 Elap per Exec(s): 執行一次SQL的平均時間。單位時間為秒。

 % Total DB Time: 為SQL的Elapsed Time時間占數據庫總時間的百分比。

SQL ID: SQL語句的ID編號，點擊之后就能導航到下邊的SQL詳細列表中，點擊IE的返回可以回到當前SQL ID的地方。

 SQL Module: 顯示該SQL是用什么方式連接到數據庫執行的，如果是用SQL*Plus或者PL/SQL鏈接上來的那基本上都是有人在調試程序。一般用前台應用鏈接過來執行的sql該位置為空。

 SQL Text: 簡單的sql提示，詳細的需要點擊SQL ID。

 

 

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SQL ordered by CPU Time

• Resources reported for PL/SQL code includes the resources used by all SQL statements called by the code.
• % Total DB Time is the Elapsed Time of the SQL statement divided into the Total Database Time multiplied by 100

CPU Time (s)	Elapsed Time (s)	Executions	CPU per Exec (s)	% Total DB Time	SQL Id	SQL Module	SQL Text
75	76	172,329	0.00	11.52	4vja2k2gdtyup	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
57	93	1	57.31	14.10	d8z0u8hgj8xdy	cuidmain@HPGICCI1 (TNS V1-V3)	insert into CUID select CUID_...
42	51	1	42.43	7.68	ackxqhnktxnbc	cusmmain@HPGICCI1 (TNS V1-V3)	insert into CUSM select CUSM_...
42	58	1	42.01	8.75	569r5k05drsj7	cumimain@HPGICCI1 (TNS V1-V3)	insert into CUMI select CUSV_...
36	38	166,069	0.00	5.67	7gtztzv329wg0		select c.name, u.name from co...
23	23	172,329	0.00	3.46	1dm3bq36vu3g8	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into iccifnsact values...
14	14	172,983	0.00	2.16	7wwv1ybs9zguz	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCIFNSACT set BORM_AD...
13	13	172,337	0.00	2.00	gmn2w09rdxn14	load_oldnewact@HPGICCI1 (TNS V1-V3)	insert into OLDNEWACT values ...
13	13	166,051	0.00	1.89	chjmy0dxf9mbj	icci_migact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
11	15	5	2.23	2.25	djs2w2f17nw2z		DECLARE job BINARY_INTEGER := ...
8	8	172,329	0.00	1.25	38apjgr0p55ns	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCICCS set CCSMAXOVER...
8	10	5	1.60	1.44	1crajpb7j5tyz		INSERT INTO STATS$SGA_TARGET_A...
8	8	172,983	0.00	1.16	5c4qu2zmj3gux	load_fnsact@HPGICCI1 (TNS V1-V3)	select * from ICCIPRODCODE wh...
4	10	1	3.54	1.46	0yv9t4qb1zb2b	cuidmain@HPGICCI1 (TNS V1-V3)	select CUID_CUST_NO , CUID_ID_...
3	35	1	3.13	5.28	6z06gcfw39pkd	SQL*Plus	SELECT F.TABLESPACE_NAME, TO_...

記錄了執行占CPU時間總和時間最長的TOP SQL(請注意是監控范圍內該SQL的執行占CPU時間總和，而不是單次SQL執行時間)。

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SQL ordered by Gets

• Resources reported for PL/SQL code includes the resources used by all SQL statements called by the code.
• Total Buffer Gets: 16,648,792
• Captured SQL account for 97.9% of Total

Buffer Gets	Executions	Gets per Exec	%Total	CPU Time (s)	Elapsed Time (s)	SQL Id	SQL Module	SQL Text
3,305,363	172,329	19.18	19.85	74.57	76.41	4vja2k2gdtyup	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
2,064,414	1	2,064,414.00	12.40	57.31	93.50	d8z0u8hgj8xdy	cuidmain@HPGICCI1 (TNS V1-V3)	insert into CUID select CUID_...
1,826,869	166,069	11.00	10.97	35.84	37.60	7gtztzv329wg0		select c.name, u.name from co...
1,427,648	172,337	8.28	8.58	12.97	13.29	gmn2w09rdxn14	load_oldnewact@HPGICCI1 (TNS V1-V3)	insert into OLDNEWACT values ...
1,278,667	172,329	7.42	7.68	22.85	22.94	1dm3bq36vu3g8	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into iccifnsact values...
1,216,367	1	1,216,367.00	7.31	42.43	50.93	ackxqhnktxnbc	cusmmain@HPGICCI1 (TNS V1-V3)	insert into CUSM select CUSM_...

記錄了執行占總buffer gets(邏輯IO)的TOP SQL(請注意是監控范圍內該SQL的執行占Gets總和，而不是單次SQL執行所占的Gets)。

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SQL ordered by Reads

• Total Disk Reads: 322,678
• Captured SQL account for 66.1% of Total

Physical Reads	Executions	Reads per Exec	%Total	CPU Time (s)	Elapsed Time (s)	SQL Id	SQL Module	SQL Text
66,286	1	66,286.00	20.54	57.31	93.50	d8z0u8hgj8xdy	cuidmain@HPGICCI1 (TNS V1-V3)	insert into CUID select CUID_...
50,646	1	50,646.00	15.70	3.54	9.70	0yv9t4qb1zb2b	cuidmain@HPGICCI1 (TNS V1-V3)	select CUID_CUST_NO , CUID_ID_...
24,507	1	24,507.00	7.59	42.01	58.04	569r5k05drsj7	cumimain@HPGICCI1 (TNS V1-V3)	insert into CUMI select CUSV_...
21,893	1	21,893.00	6.78	42.43	50.93	ackxqhnktxnbc	cusmmain@HPGICCI1 (TNS V1-V3)	insert into CUSM select CUSM_...
19,761	1	19,761.00	6.12	2.14	6.04	a7nh7j8zmfrzw	cumimain@HPGICCI1 (TNS V1-V3)	select CUSV_CUST_NO from CUMI...

記錄了執行占總磁盤物理讀(物理IO)的TOP SQL(請注意是監控范圍內該SQL的執行占磁盤物理讀總和，而不是單次SQL執行所占的磁盤物理讀)。

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SQL ordered by Executions

• Total Executions: 1,675,112
• Captured SQL account for 99.8% of Total

Executions	Rows Processed	Rows per Exec	CPU per Exec (s)	Elap per Exec (s)	SQL Id	SQL Module	SQL Text
172,983	172,329	1.00	0.00	0.00	5c4qu2zmj3gux	load_fnsact@HPGICCI1 (TNS V1-V3)	select * from ICCIPRODCODE wh...
172,983	172,329	1.00	0.00	0.00	7wwv1ybs9zguz	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCIFNSACT set BORM_AD...
172,337	172,337	1.00	0.00	0.00	gmn2w09rdxn14	load_oldnewact@HPGICCI1 (TNS V1-V3)	insert into OLDNEWACT values ...
172,329	172,329	1.00	0.00	0.00	1dm3bq36vu3g8	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into iccifnsact values...
172,329	172,329	1.00	0.00	0.00	38apjgr0p55ns	load_fnsact@HPGICCI1 (TNS V1-V3)	update ICCICCS set CCSMAXOVER...
172,329	6,286	0.04	0.00	0.00	4vja2k2gdtyup	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
166,069	166,069	1.00	0.00	0.00	7gtztzv329wg0		select c.name, u.name from co...

記錄了按照SQL的執行次數排序的TOP SQL。該排序可以看出監控范圍內的SQL執行次數。

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SQL ordered by Parse Calls

• Total Parse Calls: 182,780
• Captured SQL account for 99.0% of Total

Parse Calls	Executions	% Total Parses	SQL Id	SQL Module	SQL Text
166,069	166,069	90.86	7gtztzv329wg0		select c.name, u.name from co...
6,304	6,304	3.45	2ym6hhaq30r73		select type#, blocks, extents,...
2,437	2,438	1.33	bsa0wjtftg3uw		select file# from file$ where ...
1,568	1,568	0.86	9qgtwh66xg6nz		update seg$ set type#=:4, bloc...
1,554	1,554	0.85	aq4js2gkfjru8		update tsq$ set blocks=:3, max...
444	444	0.24	104pd9mm3fh9p		select blocks, maxblocks, gran...
421	421	0.23	350f5yrnnmshs		lock table sys.mon_mods$ in ex...
421	421	0.23	g00cj285jmgsw		update sys.mon_mods$ set inser...
86	86	0.05	3m8smr0v7v1m6		INSERT INTO sys.wri$_adv_messa...
81	81	0.04	f80h0xb1qvbsk		SELECT sys.wri$_adv_seq_msggro...

記錄了SQL的軟解析次數的TOP SQL。說到軟解析(soft prase)和硬解析(hard prase)，就不能不說一下Oracle對sql的處理過程。

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SQL ordered by Sharable Memory

• Only Statements with Sharable Memory greater than 1048576 are displayed

Sharable Mem (b)	Executions	% Total	SQL Id	SQL Module	SQL Text
2,215,022	120	0.46	aykvshm7zsabd		select size_for_estimate, ...

記錄了SQL占用library cache的大小的TOP SQL。Sharable Mem (b)：占用library cache的大小，單位是byte。

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SQL ordered by Version Count

• Only Statements with Version Count greater than 20 are displayed

Version Count	Executions	SQL Id	SQL Module	SQL Text
47	34	2q93zsrvbdw48		select grantee#, privilege#, n...
46	37	6aq34nj2zb2n7		select col#, grantee#, privi...
42	33	6769wyy3yf66f		select pos#, intcol#, col#, sp...
38	801	83taa7kaw59c1		select name, intcol#, segcol#,...
34	68	f8pavn1bvsj7t		select con#, obj#, rcon#, enab...

記錄了SQL的打開子游標的TOP SQL。

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SQL ordered by Cluster Wait Time

Cluster Wait Time (s)	CWT % of Elapsd Time	Elapsed Time(s)	CPU Time(s)	Executions	SQL Id	SQL Module	SQL Text
10.96	11.72	93.50	57.31	1	d8z0u8hgj8xdy	cuidmain@HPGICCI1 (TNS V1-V3)	insert into CUID select CUID_...
4.21	7.25	58.04	42.01	1	569r5k05drsj7	cumimain@HPGICCI1 (TNS V1-V3)	insert into CUMI select CUSV_...
3.62	7.12	50.93	42.43	1	ackxqhnktxnbc	cusmmain@HPGICCI1 (TNS V1-V3)	insert into CUSM select CUSM_...
2.39	6.35	37.60	35.84	166,069	7gtztzv329wg0		select c.name, u.name from co...
2.38	3.12	76.41	74.57	172,329	4vja2k2gdtyup	load_fnsact@HPGICCI1 (TNS V1-V3)	insert into ICCICCS values (:...
1.64	16.91	9.70	3.54	1	0yv9t4qb1zb2b	cuidmain@HPGICCI1 (TNS V1-V3)	select CUID_CUST_NO , CUID_ID_...
1.06	3.02	35.00	3.13	1	6z06gcfw39pkd	SQL*Plus	SELECT F.TABLESPACE_NAME, TO_...
0.83	13.76	6.04	2.14	1	a7nh7j8zmfrzw	cumimain@HPGICCI1 (TNS V1-V3)	select CUSV_CUST_NO from CUMI...

記錄了集群的等待時間的TOP SQL

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Complete List of SQL Text

SQL Id	SQL Text
04xtrk7uyhknh	select obj#, type#, ctime, mtime, stime, status, dataobj#, flags, oid$, spare1, spare2 from obj$ where owner#=:1 and name=:2 and namespace=:3 and remoteowner is null and linkname is null and subname is null
0hhmdwwgxbw0r	select obj#, type#, flags, related, bo, purgeobj, con# from RecycleBin$ where ts#=:1 and to_number(bitand(flags, 16)) = 16 order by dropscn
0k8h617b8guhf	delete from RecycleBin$ where purgeobj=:1
0pvtkmrrq8usg	select file#, block# from seg$ where type# = 3 and ts# = :1
0yv9t4qb1zb2b	select CUID_CUST_NO , CUID_ID_TYPE , CUID_ID_RECNO from CUID_TMP where CHGFLAG='D'
104pd9mm3fh9p	select blocks, maxblocks, grantor#, priv1, priv2, priv3 from tsq$ where ts#=:1 and user#=:2

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Instance Activity Statistics

• Instance Activity Stats
• Instance Activity Stats - Absolute Values
• Instance Activity Stats - Thread Activity

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Instance Activity Stats

Statistic	Total	per Second	per Trans
CPU used by this session	23,388	4.95	4.18
CPU used when call started	21,816	4.61	3.90
CR blocks created	2,794	0.59	0.50
Cached Commit SCN referenced	237,936	50.33	42.50
Commit SCN cached	3	0.00	0.00
DB time	583,424	123.41	104.22
DBWR checkpoint buffers written	402,781	85.20	71.95
DBWR checkpoints	9	0.00	0.00
DBWR fusion writes	255	0.05	0.05
DBWR object drop buffers written	0	0.00	0.00
DBWR thread checkpoint buffers written	221,341	46.82	39.54
DBWR transaction table writes	130	0.03	0.02
DBWR undo block writes	219,272	46.38	39.17
DFO trees parallelized	16	0.00	0.00
PX local messages recv'd	40	0.01	0.01
PX local messages sent	40	0.01	0.01
PX remote messages recv'd	80	0.02	0.01
PX remote messages sent	80	0.02	0.01
Parallel operations not downgraded	16	0.00	0.00
RowCR - row contention	9	0.00	0.00
RowCR attempts	14	0.00	0.00
RowCR hits	5	0.00	0.00
SMON posted for undo segment recovery	0	0.00	0.00
SMON posted for undo segment shrink	9	0.00	0.00
SQL*Net roundtrips to/from client	1,544,063	326.62	275.82
active txn count during cleanout	276,652	58.52	49.42
application wait time	1,620	0.34	0.29
auto extends on undo tablespace	0	0.00	0.00
background checkpoints completed	7	0.00	0.00
background checkpoints started	9	0.00	0.00
background timeouts	21,703	4.59	3.88
branch node splits	337	0.07	0.06
buffer is not pinned count	1,377,184	291.32	246.01
buffer is pinned count	20,996,139	4,441.37	3,750.65
bytes received via SQL*Net from client	7,381,397,183	1,561,408.36	1,318,577.56
bytes sent via SQL*Net to client	149,122,035	31,544.22	26,638.45
calls to get snapshot scn: kcmgss	1,696,712	358.91	303.09
calls to kcmgas	433,435	91.69	77.43
calls to kcmgcs	142,482	30.14	25.45
change write time	4,707	1.00	0.84
cleanout - number of ktugct calls	282,045	59.66	50.38
cleanouts and rollbacks - consistent read gets	55	0.01	0.01
cleanouts only - consistent read gets	2,406	0.51	0.43
cluster key scan block gets	21,886	4.63	3.91
cluster key scans	10,540	2.23	1.88
cluster wait time	2,855	0.60	0.51
commit batch/immediate performed	294	0.06	0.05
commit batch/immediate requested	294	0.06	0.05
commit cleanout failures: block lost	2,227	0.47	0.40
commit cleanout failures: callback failure	750	0.16	0.13
commit cleanout failures: cannot pin	4	0.00	0.00
commit cleanouts	427,610	90.45	76.39
commit cleanouts successfully completed	424,629	89.82	75.85
commit immediate performed	294	0.06	0.05
commit immediate requested	294	0.06	0.05
commit txn count during cleanout	111,557	23.60	19.93
concurrency wait time	515	0.11	0.09
consistent changes	1,716	0.36	0.31
consistent gets	5,037,471	1,065.59	899.87
consistent gets - examination	2,902,016	613.87	518.40
consistent gets direct	0	0.00	0.00
consistent gets from cache	5,037,471	1,065.59	899.87
current blocks converted for CR	0	0.00	0.00
cursor authentications	434	0.09	0.08
data blocks consistent reads - undo records applied	1,519	0.32	0.27
db block changes	8,594,158	1,817.95	1,535.22
db block gets	11,611,321	2,456.18	2,074.19
db block gets direct	1,167,830	247.03	208.62
db block gets from cache	10,443,491	2,209.14	1,865.58
deferred (CURRENT) block cleanout applications	20,786	4.40	3.71
dirty buffers inspected	25,007	5.29	4.47
drop segment calls in space pressure	0	0.00	0.00
enqueue conversions	6,734	1.42	1.20
enqueue releases	595,149	125.89	106.31
enqueue requests	595,158	125.90	106.32
enqueue timeouts	9	0.00	0.00
enqueue waits	7,901	1.67	1.41
exchange deadlocks	1	0.00	0.00
execute count	1,675,112	354.34	299.23
free buffer inspected	536,832	113.56	95.90
free buffer requested	746,999	158.01	133.44
gc CPU used by this session	9,099	1.92	1.63
gc cr block build time	13	0.00	0.00
gc cr block flush time	143	0.03	0.03
gc cr block receive time	474	0.10	0.08
gc cr block send time	36	0.01	0.01
gc cr blocks received	4,142	0.88	0.74
gc cr blocks served	10,675	2.26	1.91
gc current block flush time	23	0.00	0.00
gc current block pin time	34	0.01	0.01
gc current block receive time	1,212	0.26	0.22
gc current block send time	52	0.01	0.01
gc current blocks received	15,502	3.28	2.77
gc current blocks served	17,534	3.71	3.13
gc local grants	405,329	85.74	72.41
gc remote grants	318,630	67.40	56.92
gcs messages sent	1,129,094	238.84	201.70
ges messages sent	90,695	19.18	16.20
global enqueue get time	1,707	0.36	0.30
global enqueue gets async	12,731	2.69	2.27
global enqueue gets sync	190,492	40.30	34.03
global enqueue releases	190,328	40.26	34.00
global undo segment hints helped	0	0.00	0.00
global undo segment hints were stale	0	0.00	0.00
heap block compress	108,758	23.01	19.43
hot buffers moved to head of LRU	18,652	3.95	3.33
immediate (CR) block cleanout applications	2,462	0.52	0.44
immediate (CURRENT) block cleanout applications	325,184	68.79	58.09
index crx upgrade (positioned)	4,663	0.99	0.83
index fast full scans (full)	13	0.00	0.00
index fetch by key	852,181	180.26	152.23
index scans kdiixs1	339,583	71.83	60.66
leaf node 90-10 splits	34	0.01	0.01
leaf node splits	106,552	22.54	19.03
lob reads	11	0.00	0.00
lob writes	83	0.02	0.01
lob writes unaligned	83	0.02	0.01
local undo segment hints helped	0	0.00	0.00
local undo segment hints were stale	0	0.00	0.00
logons cumulative	61	0.01	0.01
messages received	20,040	4.24	3.58
messages sent	19,880	4.21	3.55
no buffer to keep pinned count	0	0.00	0.00
no work - consistent read gets	1,513,070	320.06	270.29
opened cursors cumulative	183,375	38.79	32.76
parse count (failures)	1	0.00	0.00
parse count (hard)	143	0.03	0.03
parse count (total)	182,780	38.66	32.65
parse time cpu	27	0.01	0.00
parse time elapsed	338	0.07	0.06
physical read IO requests	82,815	17.52	14.79
physical read bytes	2,643,378,176	559,161.45	472,200.46
physical read total IO requests	98,871	20.91	17.66
physical read total bytes	2,905,491,456	614,607.04	519,023.13
physical read total multi block requests	24,089	5.10	4.30
physical reads	322,678	68.26	57.64
physical reads cache	213,728	45.21	38.18
physical reads cache prefetch	191,830	40.58	34.27
physical reads direct	108,950	23.05	19.46
physical reads direct temporary tablespace	108,812	23.02	19.44
physical reads prefetch warmup	0	0.00	0.00
physical write IO requests	223,456	47.27	39.92
physical write bytes	14,042,071,040	2,970,360.02	2,508,408.55
physical write total IO requests	133,835	28.31	23.91
physical write total bytes	23,114,268,672	4,889,428.30	4,129,022.63
physical write total multi block requests	116,135	24.57	20.75
physical writes	1,714,120	362.59	306.20
physical writes direct	1,276,780	270.08	228.08
physical writes direct (lob)	0	0.00	0.00
physical writes direct temporary tablespace	108,812	23.02	19.44
physical writes from cache	437,340	92.51	78.12
physical writes non checkpoint	1,673,703	354.04	298.98
pinned buffers inspected	10	0.00	0.00
prefetch clients - default	0	0.00	0.00
prefetch warmup blocks aged out before use	0	0.00	0.00
prefetch warmup blocks flushed out before use	0	0.00	0.00
prefetched blocks aged out before use	0	0.00	0.00
process last non-idle time	4,730	1.00	0.84
queries parallelized	16	0.00	0.00
recursive calls	1,654,650	350.01	295.58
recursive cpu usage	2,641	0.56	0.47
redo blocks written	8,766,094	1,854.32	1,565.93
redo buffer allocation retries	24	0.01	0.00
redo entries	4,707,068	995.70	840.85
redo log space requests	34	0.01	0.01
redo log space wait time	50	0.01	0.01
redo ordering marks	277,042	58.60	49.49
redo size	4,343,559,400	918,805.72	775,912.72
redo subscn max counts	2,693	0.57	0.48
redo synch time	408	0.09	0.07
redo synch writes	6,984	1.48	1.25
redo wastage	1,969,620	416.64	351.84
redo write time	5,090	1.08	0.91
redo writer latching time	1	0.00	0.00
redo writes	5,494	1.16	0.98
rollback changes - undo records applied	166,609	35.24	29.76
rollbacks only - consistent read gets	1,463	0.31	0.26
rows fetched via callback	342,159	72.38	61.12
session connect time	1,461	0.31	0.26
session cursor cache hits	180,472	38.18	32.24
session logical reads	16,648,792	3,521.77	2,974.06
session pga memory	37,393,448	7,909.94	6,679.79
session pga memory max	45,192,232	9,559.64	8,072.92
session uga memory	30,067,312,240	6,360,225.77	5,371,081.14
session uga memory max	61,930,448	13,100.33	11,062.96
shared hash latch upgrades - no wait	6,364	1.35	1.14
shared hash latch upgrades - wait	0	0.00	0.00
sorts (disk)	4	0.00	0.00
sorts (memory)	2,857	0.60	0.51
sorts (rows)	42,379,505	8,964.66	7,570.47
space was found by tune down	0	0.00	0.00
space was not found by tune down	0	0.00	0.00
sql area evicted	7	0.00	0.00
sql area purged	44	0.01	0.01
steps of tune down ret. in space pressure	0	0.00	0.00
summed dirty queue length	35,067	7.42	6.26
switch current to new buffer	17	0.00	0.00
table fetch by rowid	680,469	143.94	121.56
table fetch continued row	0	0.00	0.00
table scan blocks gotten	790,986	167.32	141.30
table scan rows gotten	52,989,363	11,208.99	9,465.77
table scans (long tables)	4	0.00	0.00
table scans (short tables)	169,201	35.79	30.23
total number of times SMON posted	259	0.05	0.05
transaction lock background get time	0	0.00	0.00
transaction lock background gets	0	0.00	0.00
transaction lock foreground requests	0	0.00	0.00
transaction lock foreground wait time	0	0.00	0.00
transaction rollbacks	294	0.06	0.05
tune down retentions in space pressure	0	0.00	0.00
undo change vector size	1,451,085,596	306,952.35	259,215.00
user I/O wait time	11,992	2.54	2.14
user calls	1,544,383	326.69	275.88
user commits	812	0.17	0.15
user rollbacks	4,786	1.01	0.85
workarea executions - onepass	1	0.00	0.00
workarea executions - optimal	1,616	0.34	0.29
write clones created in background	0	0.00	0.00
write clones created in foreground	11	0.00	0.00

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Instance Activity Stats - Absolute Values

• Statistics with absolute values (should not be diffed)

Statistic	Begin Value	End Value
session cursor cache count	3,024	3,592
opened cursors current	37	39
logons current	24	26

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Instance Activity Stats - Thread Activity

• Statistics identified by '(derived)' come from sources other than SYSSTAT

Statistic	Total	per Hour
log switches (derived)	9	6.85

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IO Stats

• Tablespace IO Stats
• File IO Stats

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Tablespace IO Stats

• ordered by IOs (Reads + Writes) desc

Tablespace	Reads	Av Reads/s	Av Rd(ms)	Av Blks/Rd	Writes	Av Writes/s	Buffer Waits	Av Buf Wt(ms)
ICCIDAT01	67,408	14	3.76	3.17	160,261	34	6	0.00
UNDOTBS1	10	0	12.00	1.00	57,771	12	625	0.02
TEMP	15,022	3	8.74	7.24	3,831	1	0	0.00
USERS	68	0	5.44	1.00	971	0	0	0.00
SYSAUX	263	0	5.48	1.00	458	0	0	0.00
SYSTEM	32	0	5.94	1.00	158	0	3	23.33
UNDOTBS2	6	0	16.67	1.00	6	0	0	0.00

顯示每個表空間的I/O統計。根據Oracle經驗，Av Rd(ms) [Average Reads in milliseconds]不應該超過30，否則認為有I/O爭用。

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File IO Stats

• ordered by Tablespace, File

Tablespace	Filename	Reads	Av Reads/s	Av Rd(ms)	Av Blks/Rd	Writes	Av Writes/s	Buffer Waits	Av Buf Wt(ms)
ICCIDAT01	/dev/rora_icci01	5,919	1	4.30	3.73	15,161	3	1	0.00
ICCIDAT01	/dev/rora_icci02	7,692	2	4.12	3.18	16,555	4	0	0.00
ICCIDAT01	/dev/rora_icci03	6,563	1	2.59	3.80	15,746	3	0	0.00
ICCIDAT01	/dev/rora_icci04	8,076	2	2.93	3.11	16,164	3	0	0.00
ICCIDAT01	/dev/rora_icci05	6,555	1	2.61	3.31	21,958	5	0	0.00
ICCIDAT01	/dev/rora_icci06	6,943	1	4.03	3.41	20,574	4	0	0.00
ICCIDAT01	/dev/rora_icci07	7,929	2	4.12	2.87	18,263	4	0	0.00
ICCIDAT01	/dev/rora_icci08	7,719	2	3.83	2.99	17,361	4	0	0.00
ICCIDAT01	/dev/rora_icci09	6,794	1	4.79	3.29	18,425	4	0	0.00
ICCIDAT01	/dev/rora_icci10	211	0	5.31	1.00	6	0	0	0.00
ICCIDAT01	/dev/rora_icci11	1,168	0	4.45	1.00	6	0	0	0.00
ICCIDAT01	/dev/rora_icci12	478	0	4.23	1.00	6	0	0	0.00
ICCIDAT01	/dev/rora_icci13	355	0	5.13	1.00	6	0	0	0.00
ICCIDAT01	/dev/rora_icci14	411	0	4.91	1.00	6	0	1	0.00
ICCIDAT01	/dev/rora_icci15	172	0	5.29	1.00	6	0	1	0.00
ICCIDAT01	/dev/rora_icci16	119	0	7.23	1.00	6	0	1	0.00
ICCIDAT01	/dev/rora_icci17	227	0	6.26	1.00	6	0	1	0.00
ICCIDAT01	/dev/rora_icci18	77	0	8.44	1.00	6	0	1	0.00
SYSAUX	/dev/rora_SYSAUX	263	0	5.48	1.00	458	0	0	0.00
SYSTEM	/dev/rora_SYSTEM	32	0	5.94	1.00	158	0	3	23.33
TEMP	/dev/rora_TEMP	3,653	1	5.67	6.61	827	0	0
TEMP	/dev/rora_TEMP2	2,569	1	4.42	6.70	556	0	0
TEMP	/dev/rora_TEMP3	1,022	0	2.50	16.86	557	0	0
TEMP	/dev/rora_TEMP5	7,778	2	12.43	6.46	1,891	0	0
UNDOTBS1	/dev/rora_UNDO0101	10	0	12.00	1.00	57,771	12	625	0.02
UNDOTBS2	/dev/rora_UNDO0201	6	0	16.67	1.00	6	0	0	0.00
USERS	/dev/rora_USERS	68	0	5.44	1.00	971	0	0	0.00

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Buffer Pool Statistics

• Standard block size Pools D: default, K: keep, R: recycle
• Default Pools for other block sizes: 2k, 4k, 8k, 16k, 32k

P	Number of Buffers	Pool Hit%	Buffer Gets	Physical Reads	Physical Writes	Free Buff Wait	Writ Comp Wait	Buffer Busy Waits
D	401,071	99	15,480,754	213,729	437,340	0	0	634

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Advisory Statistics

• Instance Recovery Stats
• Buffer Pool Advisory
• PGA Aggr Summary
• PGA Aggr Target Stats
• PGA Aggr Target Histogram
• PGA Memory Advisory
• Shared Pool Advisory
• SGA Target Advisory
• Streams Pool Advisory
• Java Pool Advisory

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Instance Recovery Stats

• B: Begin snapshot, E: End snapshot

	Targt MTTR (s)	Estd MTTR (s)	Recovery Estd IOs	Actual Redo Blks	Target Redo Blks	Log File Size Redo Blks	Log Ckpt Timeout Redo Blks	Log Ckpt Interval Redo Blks
B	0	11	369	2316	5807	1883700	5807
E	0	98	116200	1828613	1883700	1883700	5033355

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Buffer Pool Advisory

• Only rows with estimated physical reads >0 are displayed
• ordered by Block Size, Buffers For Estimate

P	Size for Est (M)	Size Factor	Buffers for Estimate	Est Phys Read Factor	Estimated Physical Reads
D	320	0.10	38,380	1.34	10,351,726
D	640	0.19	76,760	1.25	9,657,000
D	960	0.29	115,140	1.08	8,365,242
D	1,280	0.38	153,520	1.04	8,059,415
D	1,600	0.48	191,900	1.02	7,878,202
D	1,920	0.57	230,280	1.01	7,841,140
D	2,240	0.67	268,660	1.01	7,829,141
D	2,560	0.77	307,040	1.01	7,817,370
D	2,880	0.86	345,420	1.01	7,804,884
D	3,200	0.96	383,800	1.00	7,784,014
D	3,344	1.00	401,071	1.00	7,748,403
D	3,520	1.05	422,180	0.99	7,702,243
D	3,840	1.15	460,560	0.99	7,680,429
D	4,160	1.24	498,940	0.99	7,663,046
D	4,480	1.34	537,320	0.99	7,653,232
D	4,800	1.44	575,700	0.99	7,645,544
D	5,120	1.53	614,080	0.98	7,630,008
D	5,440	1.63	652,460	0.98	7,616,886
D	5,760	1.72	690,840	0.98	7,614,591
D	6,080	1.82	729,220	0.98	7,613,191
D	6,400	1.91	767,600	0.98	7,599,930

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PGA Aggr Summary

• PGA cache hit % - percentage of W/A (WorkArea) data processed only in-memory

PGA Cache Hit %	W/A MB Processed	Extra W/A MB Read/Written
87.91	1,100	151

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PGA Aggr Target Stats

• B: Begin snap E: End snap (rows dentified with B or E contain data which is absolute i.e. not diffed over the interval)
• Auto PGA Target - actual workarea memory target
• W/A PGA Used - amount of memory used for all Workareas (manual + auto)
• %PGA W/A Mem - percentage of PGA memory allocated to workareas
• %Auto W/A Mem - percentage of workarea memory controlled by Auto Mem Mgmt
• %Man W/A Mem - percentage of workarea memory under manual control

	PGA Aggr Target(M)	Auto PGA Target(M)	PGA Mem Alloc(M)	W/A PGA Used(M)	%PGA W/A Mem	%Auto W/A Mem	%Man W/A Mem	Global Mem Bound(K)
B	1,024	862	150.36	0.00	0.00	0.00	0.00	104,850
E	1,024	860	154.14	0.00	0.00	0.00	0.00	104,850

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PGA Aggr Target Histogram

• Optimal Executions are purely in-memory operations

Low Optimal	High Optimal	Total Execs	Optimal Execs	1-Pass Execs	M-Pass Execs
2K	4K	1,385	1,385	0	0
64K	128K	28	28	0	0
128K	256K	5	5	0	0
256K	512K	79	79	0	0
512K	1024K	108	108	0	0
1M	2M	7	7	0	0
8M	16M	1	1	0	0
128M	256M	3	2	1	0
256M	512M	1	1	0	0

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PGA Memory Advisory

• When using Auto Memory Mgmt, minimally choose a pga_aggregate_target value where Estd PGA Overalloc Count is 0

PGA Target Est (MB)	Size Factr	W/A MB Processed	Estd Extra W/A MB Read/ Written to Disk	Estd PGA Cache Hit %	Estd PGA Overalloc Count
128	0.13	4,652.12	2,895.99	62.00	0
256	0.25	4,652.12	2,857.13	62.00	0
512	0.50	4,652.12	2,857.13	62.00	0
768	0.75	4,652.12	2,857.13	62.00	0
1,024	1.00	4,652.12	717.82	87.00	0
1,229	1.20	4,652.12	717.82	87.00	0
1,434	1.40	4,652.12	717.82	87.00	0
1,638	1.60	4,652.12	717.82	87.00	0
1,843	1.80	4,652.12	717.82	87.00	0
2,048	2.00	4,652.12	717.82	87.00	0
3,072	3.00	4,652.12	717.82	87.00	0
4,096	4.00	4,652.12	717.82	87.00	0
6,144	6.00	4,652.12	717.82	87.00	0
8,192	8.00	4,652.12	717.82	87.00	0

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Shared Pool Advisory

• SP: Shared Pool Est LC: Estimated Library Cache Factr: Factor
• Note there is often a 1:Many correlation between a single logical object in the Library Cache, and the physical number of memory objects associated with it. Therefore comparing the number of Lib Cache objects (e.g. in v$librarycache), with the number of Lib Cache Memory Objects is invalid.

Shared Pool Size(M)	SP Size Factr	Est LC Size (M)	Est LC Mem Obj	Est LC Time Saved (s)	Est LC Time Saved Factr	Est LC Load Time (s)	Est LC Load Time Factr	Est LC Mem Obj Hits
304	0.43	78	7,626	64,842	1.00	31	1.00	3,206,955
384	0.55	78	7,626	64,842	1.00	31	1.00	3,206,955
464	0.66	78	7,626	64,842	1.00	31	1.00	3,206,955
544	0.77	78	7,626	64,842	1.00	31	1.00	3,206,955
624	0.89	78	7,626	64,842	1.00	31	1.00	3,206,955
704	1.00	78	7,626	64,842	1.00	31	1.00	3,206,955
784	1.11	78	7,626	64,842	1.00	31	1.00	3,206,955
864	1.23	78	7,626	64,842	1.00	31	1.00	3,206,955
944	1.34	78	7,626	64,842	1.00	31	1.00	3,206,955
1,024	1.45	78	7,626	64,842	1.00	31	1.00	3,206,955
1,104	1.57	78	7,626	64,842	1.00	31	1.00	3,206,955
1,184	1.68	78	7,626	64,842	1.00	31	1.00	3,206,955
1,264	1.80	78	7,626	64,842	1.00	31	1.00	3,206,955
1,344	1.91	78	7,626	64,842	1.00	31	1.00	3,206,955
1,424	2.02	78	7,626	64,842	1.00	31	1.00	3,206,955

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SGA Target Advisory

SGA Target Size (M)	SGA Size Factor	Est DB Time (s)	Est Physical Reads
1,024	0.25	9,060	9,742,760
2,048	0.50	7,612	7,948,245
3,072	0.75	7,563	7,886,258
4,096	1.00	7,451	7,748,338
5,120	1.25	7,423	7,713,470
6,144	1.50	7,397	7,680,927
7,168	1.75	7,385	7,666,980
8,192	2.00	7,385	7,666,980

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Streams Pool Advisory

No data exists for this section of the report.

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Java Pool Advisory

No data exists for this section of the report.

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Wait Statistics

• Buffer Wait Statistics
• Enqueue Activity

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Buffer Wait Statistics

• ordered by wait time desc, waits desc

Class	Waits	Total Wait Time (s)	Avg Time (ms)
data block	3	0	23
undo header	616	0	0
file header block	8	0	0
undo block	7	0	0

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Enqueue Activity

• only enqueues with waits are shown
• Enqueue stats gathered prior to 10g should not be compared with 10g data
• ordered by Wait Time desc, Waits desc

Enqueue Type (Request Reason)	Requests	Succ Gets	Failed Gets	Waits	Wt Time (s)	Av Wt Time(ms)
FB-Format Block	14,075	14,075	0	7,033	3	0.43
US-Undo Segment	964	964	0	556	0	0.32
WF-AWR Flush	24	24	0	14	0	9.00
HW-Segment High Water Mark	4,223	4,223	0	37	0	1.22
CF-Controlfile Transaction	10,548	10,548	0	58	0	0.67
TX-Transaction (index contention)	1	1	0	1	0	35.00
TM-DML	121,768	121,761	6	70	0	0.43
PS-PX Process Reservation	103	103	0	46	0	0.65
TT-Tablespace	9,933	9,933	0	39	0	0.54
TD-KTF map table enqueue (KTF dump entries)	12	12	0	12	0	1.42
TA-Instance Undo	18	18	0	13	0	0.38
PI-Remote PX Process Spawn Status	16	16	0	8	0	0.50
MW-MWIN Schedule	3	3	0	3	0	0.67
DR-Distributed Recovery	3	3	0	3	0	0.33
TS-Temporary Segment	14	11	3	3	0	0.33
AF-Advisor Framework (task serialization)	14	14	0	1	0	1.00
JS-Job Scheduler (job run lock - synchronize)	2	2	0	1	0	1.00
UL-User-defined	2	2	0	1	0	1.00
MD-Materialized View Log DDL	6	6	0	2	0	0.00

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Undo Statistics

• Undo Segment Summary
• Undo Segment Stats

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Undo Segment Summary

• Min/Max TR (mins) - Min and Max Tuned Retention (minutes)
• STO - Snapshot Too Old count, OOS - Out of Space count
• Undo segment block stats:
• uS - unexpired Stolen, uR - unexpired Released, uU - unexpired reUsed
• eS - expired Stolen, eR - expired Released, eU - expired reUsed

Undo TS#	Num Undo Blocks (K)	Number of Transactions	Max Qry Len (s)	Max Tx Concurcy	Min/Max TR (mins)	STO/ OOS	uS/uR/uU/ eS/eR/eU
1	219.12	113,405	0	6	130.95/239.25	0/0	0/0/0/13/24256/0

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Undo Segment Stats

• Most recent 35 Undostat rows, ordered by Time desc

End Time	Num Undo Blocks	Number of Transactions	Max Qry Len (s)	Max Tx Concy	Tun Ret (mins)	STO/ OOS	uS/uR/uU/ eS/eR/eU
25-Dec 15:18	182,021	74,309	0	5	131	0/0	0/0/0/13/24256/0
25-Dec 15:08	57	170	0	3	239	0/0	0/0/0/0/0/0
25-Dec 14:58	68	31	0	2	229	0/0	0/0/0/0/0/0
25-Dec 14:48	194	4,256	0	4	219	0/0	0/0/0/0/0/0
25-Dec 14:38	570	12,299	0	5	209	0/0	0/0/0/0/0/0
25-Dec 14:28	36,047	21,328	0	6	200	0/0	0/0/0/0/0/0
25-Dec 14:18	70	907	0	3	162	0/0	0/0/0/0/0/0
25-Dec 14:08	91	105	0	3	154	0/0	0/0/0/0/0/0

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Latch Statistics

• Latch Activity
• Latch Sleep Breakdown
• Latch Miss Sources
• Parent Latch Statistics
• Child Latch Statistics

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Latch Activity

• "Get Requests", "Pct Get Miss" and "Avg Slps/Miss" are statistics for willing-to-wait latch get requests
• "NoWait Requests", "Pct NoWait Miss" are for no-wait latch get requests
• "Pct Misses" for both should be very close to 0.0

Latch Name	Get Requests	Pct Get Miss	Avg Slps /Miss	Wait Time (s)	NoWait Requests	Pct NoWait Miss
ASM db client latch	11,883	0.00		0	0
AWR Alerted Metric Element list	18,252	0.00		0	0
Consistent RBA	5,508	0.02	0.00	0	0
FOB s.o list latch	731	0.00		0	0
JS broadcast add buf latch	6,193	0.00		0	0
JS broadcast drop buf latch	6,194	0.00		0	0
JS broadcast load blnc latch	6,057	0.00		0	0
JS mem alloc latch	8	0.00		0	0
JS queue access latch	8	0.00		0	0
JS queue state obj latch	218,086	0.00		0	0
JS slv state obj latch	31	0.00		0	0
KCL gc element parent latch	2,803,392	0.04	0.01	0	108	0.00
KJC message pool free list	43,168	0.06	0.00	0	14,532	0.01
KJCT flow control latch	563,875	0.00	0.00	0	0
KMG MMAN ready and startup request latch	1,576	0.00		0	0
KSXR large replies	320	0.00		0	0
KTF sga latch	23	0.00		0	1,534	0.00
KWQMN job cache list latch	352	0.00		0	0
KWQP Prop Status	5	0.00		0	0
MQL Tracking Latch	0			0	94	0.00
Memory Management Latch	0			0	1,576	0.00
OS process	207	0.00		0	0
OS process allocation	1,717	0.00		0	0
OS process: request allocation	73	0.00		0	0
PL/SQL warning settings	226	0.00		0	0
SGA IO buffer pool latch	20,679	0.06	0.00	0	20,869	0.00
SQL memory manager latch	7	0.00		0	1,575	0.00
SQL memory manager workarea list latch	439,442	0.00		0	0
Shared B-Tree	182	0.00		0	0
Undo Hint Latch	0			0	12	0.00
active checkpoint queue latch	7,835	0.00		0	0
active service list	50,936	0.00		0	1,621	0.00
archive control	5	0.00		0	0
begin backup scn array	72,901	0.00	0.00	0	0
business card	32	0.00		0	0
cache buffer handles	331,153	0.02	0.00	0	0
cache buffers chains	48,189,073	0.00	0.00	0	1,201,379	0.00
cache buffers lru chain	891,796	0.34	0.00	0	991,605	0.23
cache table scan latch	0			0	10,309	0.01
channel handle pool latch	99	0.00		0	0
channel operations parent latch	490,324	0.01	0.00	0	0
checkpoint queue latch	671,856	0.01	0.00	0	555,469	0.02
client/application info	335	0.00		0	0
commit callback allocation	12	0.00		0	0
compile environment latch	173,428	0.00		0	0
dml lock allocation	243,087	0.00	0.00	0	0
dummy allocation	134	0.00		0	0
enqueue hash chains	1,539,499	0.01	0.03	0	263	0.00
enqueues	855,207	0.02	0.00	0	0
error message lists	64	0.00		0	0
event group latch	38	0.00		0	0
file cache latch	4,694	0.00		0	0
gcs drop object freelist	8,451	0.19	0.00	0	0
gcs opaque info freelist	38,584	0.00	0.00	0	0
gcs partitioned table hash	9,801,867	0.00		0	0
gcs remaster request queue	31	0.00		0	0
gcs remastering latch	1,014,198	0.00	0.33	0	0
gcs resource freelist	1,154,551	0.03	0.00	0	771,650	0.00
gcs resource hash	3,815,373	0.02	0.00	0	2	0.00
gcs resource scan list	4	0.00		0	0
gcs shadows freelist	795,482	0.00	0.00	0	779,648	0.00
ges caches resource lists	209,655	0.02	0.00	0	121,613	0.01
ges deadlock list	840	0.00		0	0
ges domain table	366,702	0.00		0	0
ges enqueue table freelist	487,875	0.00		0	0
ges group table	543,887	0.00		0	0
ges process hash list	59,503	0.00		0	0
ges process parent latch	908,232	0.00		0	1	0.00
ges process table freelist	73	0.00		0	0
ges resource hash list	862,590	0.02	0.28	0	72,266	0.01
ges resource scan list	534	0.00		0	0
ges resource table freelist	135,406	0.00	0.00	0	0
ges synchronous data	160	0.63	0.00	0	2,954	0.07
ges timeout list	3,256	0.00		0	4,478	0.00
global KZLD latch for mem in SGA	21	0.00		0	0
hash table column usage latch	59	0.00		0	1,279	0.00
hash table modification latch	116	0.00		0	0
job workq parent latch	0			0	14	0.00
job_queue_processes parameter latch	86	0.00		0	0
kks stats	384	0.00		0	0
ksuosstats global area	329	0.00		0	0
ktm global data	296	0.00		0	0
kwqbsn:qsga	182	0.00		0	0
lgwr LWN SCN	6,547	0.18	0.00	0	0
library cache	235,060	0.00	0.00	0	22	0.00
library cache load lock	486	0.00		0	0
library cache lock	49,284	0.00		0	0
library cache lock allocation	566	0.00		0	0
library cache pin	27,863	0.00	0.00	0	0
library cache pin allocation	204	0.00		0	0
list of block allocation	10,101	0.00		0	0
loader state object freelist	108	0.00		0	0
longop free list parent	6	0.00		0	6	0.00
message pool operations parent latch	1,424	0.00		0	0
messages	222,581	0.00	0.00	0	0
mostly latch-free SCN	6,649	1.43	0.00	0	0
multiblock read objects	29,230	0.03	0.00	0	0
name-service memory objects	18,842	0.00		0	0
name-service namespace bucket	56,712	0.00		0	0
name-service namespace objects	15	0.00		0	0
name-service pending queue	6,436	0.00		0	0
name-service request	44	0.00		0	0
name-service request queue	57,312	0.00		0	0
ncodef allocation latch	77	0.00		0	0
object queue header heap	37,721	0.00		0	7,457	0.00
object queue header operation	2,706,992	0.06	0.00	0	0
object stats modification	22	0.00		0	0
parallel query alloc buffer	939	0.00		0	0
parallel query stats	72	0.00		0	0
parallel txn reco latch	630	0.00		0	0
parameter list	193	0.00		0	0
parameter table allocation management	68	0.00		0	0
post/wait queue	4,205	0.00		0	2,712	0.00
process allocation	46,895	0.00		0	38	0.00
process group creation	73	0.00		0	0
process queue	175	0.00		0	0
process queue reference	2,621	0.00		0	240	62.50
qmn task queue latch	668	0.15	1.00	0	0
query server freelists	159	0.00		0	0
query server process	8	0.00		0	7	0.00
queued dump request	23,628	0.00		0	0
redo allocation	21,206	0.57	0.00	0	4,706,826	0.02
redo copy	0			0	4,707,106	0.01
redo writing	29,944	0.01	0.00	0	0
resmgr group change latch	69	0.00		0	0
resmgr:actses active list	137	0.00		0	0
resmgr:actses change group	52	0.00		0	0
resmgr:free threads list	130	0.00		0	0
resmgr:schema config	7	0.00		0	0
row cache objects	1,644,149	0.00	0.00	0	321	0.00
rules engine rule set statistics	500	0.00		0	0
sequence cache	360	0.00		0	0
session allocation	535,514	0.00	0.00	0	0
session idle bit	3,262,141	0.00	0.00	0	0
session state list latch	166	0.00		0	0
session switching	77	0.00		0	0
session timer	1,620	0.00		0	0
shared pool	60,359	0.00	0.00	0	0
shared pool sim alloc	13	0.00		0	0
shared pool simulator	4,246	0.00		0	0
simulator hash latch	1,862,803	0.00		0	0
simulator lru latch	1,719,480	0.01	0.00	0	46,053	0.00
slave class	2	0.00		0	0
slave class create	8	12.50	1.00	0	0
sort extent pool	1,284	0.00		0	0
state object free list	4	0.00		0	0
statistics aggregation	280	0.00		0	0
temp lob duration state obj allocation	2	0.00		0	0
threshold alerts latch	202	0.00		0	0
transaction allocation	211	0.00		0	0
transaction branch allocation	77	0.00		0	0
undo global data	779,759	0.07	0.00	0	0
user lock	102	0.00		0	0

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Latch Sleep Breakdown

• ordered by misses desc

Latch Name	Get Requests	Misses	Sleeps	Spin Gets	Sleep1	Sleep2	Sleep3
cache buffers lru chain	891,796	3,061	1	3,060	0	0	0
object queue header operation	2,706,992	1,755	3	1,752	0	0	0
KCL gc element parent latch	2,803,392	1,186	11	1,176	0	0	0
cache buffers chains	48,189,073	496	1	495	0	0	0
ges resource hash list	862,590	160	44	116	0	0	0
enqueue hash chains	1,539,499	79	2	78	0	0	0
gcs remastering latch	1,014,198	3	1	2	0	0	0
qmn task queue latch	668	1	1	0	0	0	0
slave class create	8	1	1	0	0	0	0

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Latch Miss Sources

• only latches with sleeps are shown
• ordered by name, sleeps desc

Latch Name	Where	NoWait Misses	Sleeps	Waiter Sleeps
KCL gc element parent latch	kclrwrite	0	8	0
KCL gc element parent latch	kclnfndnewm	0	4	6
KCL gc element parent latch	KCLUNLNK	0	1	1
KCL gc element parent latch	kclbla	0	1	0
KCL gc element parent latch	kclulb	0	1	1
KCL gc element parent latch	kclzcl	0	1	0
cache buffers chains	kcbnew: new latch again	0	2	0
cache buffers chains	kclwrt	0	1	0
cache buffers lru chain	kcbzgws	0	1	0
enqueue hash chains	ksqcmi: if lk mode not requested	0	2	0
event range base latch	No latch	0	1	1
gcs remastering latch	69	0	1	0
ges resource hash list	kjlmfnd: search for lockp by rename and inst id	0	23	0
ges resource hash list	kjakcai: search for resp by resname	0	13	0
ges resource hash list	kjrmas1: lookup master node	0	5	0
ges resource hash list	kjlrlr: remove lock from resource queue	0	2	33
ges resource hash list	kjcvscn: remove from scan queue	0	1	0
object queue header operation	kcbo_switch_q_bg	0	3	0
object queue header operation	kcbo_switch_mq_bg	0	2	4
object queue header operation	kcbw_unlink_q	0	2	0
object queue header operation	kcbw_link_q	0	1	0
slave class create	ksvcreate	0	1	0

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Parent Latch Statistics

No data exists for this section of the report.

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Child Latch Statistics

No data exists for this section of the report.

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Segment Statistics

• Segments by Logical Reads
• Segments by Physical Reads
• Segments by Row Lock Waits
• Segments by ITL Waits
• Segments by Buffer Busy Waits
• Segments by Global Cache Buffer Busy
• Segments by CR Blocks Received
• Segments by Current Blocks Received

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Segments by Logical Reads

• Total Logical Reads: 16,648,792
• Captured Segments account for 85.2% of Total

Owner	Tablespace Name	Object Name	Subobject Name	Obj. Type	Logical Reads	%Total
ICCI01	ICCIDAT01	ICCICCS_PK		INDEX	1,544,848	9.28
ICCI01	ICCIDAT01	CUSCAD_TMP		TABLE	1,349,536	8.11
ICCI01	ICCIDAT01	ICCIFNSACT_PK		INDEX	1,268,400	7.62
ICCI01	ICCIDAT01	IND_OLDNEWACT		INDEX	1,071,072	6.43
ICCI01	ICCIDAT01	CUID_PK		INDEX	935,584	5.62

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Segments by Physical Reads

• Total Physical Reads: 322,678
• Captured Segments account for 64.2% of Total

Owner	Tablespace Name	Object Name	Subobject Name	Obj. Type	Physical Reads	%Total
ICCI01	ICCIDAT01	CUID_TMP		TABLE	116,417	36.08
ICCI01	ICCIDAT01	CUMI_TMP		TABLE	44,086	13.66
ICCI01	ICCIDAT01	CUSM_TMP		TABLE	26,078	8.08
ICCI01	ICCIDAT01	CUSVAA_TMP_PK		INDEX	19,554	6.06
ICCI01	ICCIDAT01	CUID		TABLE	259	0.08

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Segments by Row Lock Waits

當一個進程予在正被其它進程鎖住的數據行上獲得排它鎖時發生這種等待。這種等待經常是由於在一個有主鍵索引的表上做大量INSERT操作。

No data exists for this section of the report.

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Segments by ITL Waits

No data exists for this section of the report.

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Segments by Buffer Busy Waits

No data exists for this section of the report.

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Segments by Global Cache Buffer Busy

• % of Capture shows % of GC Buffer Busy for each top segment compared
• with GC Buffer Busy for all segments captured by the Snapshot

Owner	Tablespace Name	Object Name	Subobject Name	Obj. Type	GC Buffer Busy	% of Capture
SYS	SYSTEM	TSQ$		TABLE	2	100.00

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Segments by CR Blocks Received

• Total CR Blocks Received: 4,142
• Captured Segments account for 95.6% of Total

Owner	Tablespace Name	Object Name	Subobject Name	Obj. Type	CR Blocks Received	%Total
SYS	SYSTEM	USER$		TABLE	1,001	24.17
SYS	SYSTEM	TSQ$		TABLE	722	17.43
SYS	SYSTEM	SEG$		TABLE	446	10.77
SYS	SYSTEM	OBJ$		TABLE	264	6.37
SYS	SYSTEM	I_OBJ2		INDEX	174	4.20

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Segments by Current Blocks Received

• Total Current Blocks Received: 15,502
• Captured Segments account for 84.8% of Total

Owner	Tablespace Name	Object Name	Subobject Name	Obj. Type	Current Blocks Received	%Total
ICCI01	ICCIDAT01	CUSM_TMP		TABLE	5,764	37.18
ICCI01	ICCIDAT01	CUMI_TMP		TABLE	2,794	18.02
ICCI01	ICCIDAT01	CUID_TMP		TABLE	2,585	16.68
SYS	SYSTEM	SEG$		TABLE	361	2.33
SYS	SYSTEM	TSQ$		TABLE	361	2.33

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Dictionary Cache Statistics

• Dictionary Cache Stats
• Dictionary Cache Stats (RAC)

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Dictionary Cache Stats

• "Pct Misses" should be very low (< 2% in most cases)
• "Final Usage" is the number of cache entries being used

Cache	Get Requests	Pct Miss	Scan Reqs	Pct Miss	Mod Reqs	Final Usage
dc_awr_control	86	0.00	0		4	1
dc_constraints	59	91.53	0		20	1,350
dc_files	23	0.00	0		0	23
dc_global_oids	406	0.00	0		0	35
dc_histogram_data	673	0.15	0		0	1,555
dc_histogram_defs	472	24.36	0		0	4,296
dc_object_grants	58	0.00	0		0	154
dc_object_ids	1,974	6.13	0		0	1,199
dc_objects	955	19.58	0		56	2,064
dc_profiles	30	0.00	0		0	1
dc_rollback_segments	3,358	0.00	0		0	37
dc_segments	2,770	2.56	0		1,579	1,312
dc_sequences	9	33.33	0		9	5
dc_table_scns	6	100.00	0		0	0
dc_tablespace_quotas	1,558	28.50	0		1,554	3
dc_tablespaces	346,651	0.00	0		0	7
dc_usernames	434	0.00	0		0	14
dc_users	175,585	0.00	0		0	43
outstanding_alerts	57	71.93	0		0	1

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Dictionary Cache Stats (RAC)

Cache	GES Requests	GES Conflicts	GES Releases
dc_awr_control	8	0	0
dc_constraints	88	22	0
dc_histogram_defs	115	0	0
dc_object_ids	143	101	0
dc_objects	253	111	0
dc_segments	3,228	49	0
dc_sequences	17	3	0
dc_table_scns	6	0	0
dc_tablespace_quotas	3,093	441	0
dc_users	8	1	0
outstanding_alerts	113	41	0

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Library Cache Statistics

• Library Cache Activity
• Library Cache Activity (RAC)

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Library Cache Activity

• "Pct Misses" should be very low

Namespace	Get Requests	Pct Miss	Pin Requests	Pct Miss	Reloads	Invali- dations
BODY	105	0.00	247	0.00	0	0
CLUSTER	3	0.00	4	0.00	0	0
INDEX	13	46.15	26	42.31	5	0
SQL AREA	56	100.00	1,857,002	0.02	32	12
TABLE/PROCEDURE	179	35.75	3,477	8.02	63	0
TRIGGER	323	0.00	386	0.00	0	0

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Library Cache Activity (RAC)

Namespace	GES Lock Requests	GES Pin Requests	GES Pin Releases	GES Inval Requests	GES Invali- dations
BODY	5	0	0	0	0
CLUSTER	4	0	0	0	0
INDEX	26	22	6	17	0
TABLE/PROCEDURE	1,949	285	63	244	0

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Memory Statistics

• Process Memory Summary
• SGA Memory Summary
• SGA breakdown difference

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Process Memory Summary

• B: Begin snap E: End snap
• All rows below contain absolute values (i.e. not diffed over the interval)
• Max Alloc is Maximum PGA Allocation size at snapshot time
• Hist Max Alloc is the Historical Max Allocation for still-connected processes
• ordered by Begin/End snapshot, Alloc (MB) desc

	Category	Alloc (MB)	Used (MB)	Avg Alloc (MB)	Std Dev Alloc (MB)	Max Alloc (MB)	Hist Max Alloc (MB)	Num Proc	Num Alloc
B	Other	136.42		5.25	8.55	24	27	26	26
	Freeable	13.50	0.00	1.50	1.11	3		9	9
	SQL	0.33	0.16	0.03	0.03	0	2	12	10
	PL/SQL	0.12	0.06	0.01	0.01	0	0	24	24
E	Other	138.65		4.78	8.20	24	27	29	29
	Freeable	14.94	0.00	1.36	1.04	3		11	11
	SQL	0.39	0.19	0.03	0.03	0	2	15	12
	PL/SQL	0.18	0.11	0.01	0.01	0	0	27	26

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SGA Memory Summary

SGA regions	Begin Size (Bytes)	End Size (Bytes) (if different)
Database Buffers	3,506,438,144
Fixed Size	2,078,368
Redo Buffers	14,696,448
Variable Size	771,754,336

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SGA breakdown difference

• ordered by Pool, Name
• N/A value for Begin MB or End MB indicates the size of that Pool/Name was insignificant, or zero in that snapshot

Pool	Name	Begin MB	End MB	% Diff
java	free memory	16.00	16.00	0.00
large	PX msg pool	1.03	1.03	0.00
large	free memory	14.97	14.97	0.00
shared	ASH buffers	15.50	15.50	0.00
shared	CCursor	8.58	8.85	3.09
shared	KQR L PO	8.75	8.80	0.55
shared	db_block_hash_buckets	22.50	22.50	0.00
shared	free memory	371.80	369.61	-0.59
shared	gcs resources	66.11	66.11	0.00
shared	gcs shadows	41.65	41.65	0.00
shared	ges big msg buffers	13.75	13.75	0.00
shared	ges enqueues	7.44	7.56	1.63
shared	ges reserved msg buffers	7.86	7.86	0.00
shared	library cache	10.78	10.93	1.41
shared	row cache	7.16	7.16	0.00
shared	sql area	27.49	28.50	3.67
	buffer_cache	3,344.00	3,344.00	0.00
	fixed_sga	1.98	1.98	0.00
	log_buffer	14.02	14.02	0.00

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Streams Statistics

• Streams CPU/IO Usage
• Streams Capture
• Streams Apply
• Buffered Queues
• Buffered Subscribers
• Rule Set

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Streams CPU/IO Usage

No data exists for this section of the report.

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Streams Capture

No data exists for this section of the report.

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Streams Apply

No data exists for this section of the report.

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Buffered Queues

No data exists for this section of the report.

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Buffered Subscribers

No data exists for this section of the report.

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Rule Set

No data exists for this section of the report.

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Resource Limit Stats

• only rows with Current or Maximum Utilization > 80% of Limit are shown
• ordered by resource name

Resource Name	Current Utilization	Maximum Utilization	Initial Allocation	Limit
gcs_resources	349,392	446,903	450063	450063
gcs_shadows	400,300	447,369	450063	450063

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init.ora Parameters

Parameter Name	Begin value	End value (if different)
audit_file_dest	/oracle/app/oracle/admin/ICCI/adump
background_dump_dest	/oracle/app/oracle/admin/ICCI/bdump
cluster_database	TRUE
cluster_database_instances	2
compatible	10.2.0.3.0
control_files	/dev/rora_CTL01, /dev/rora_CTL02, /dev/rora_CTL03
core_dump_dest	/oracle/app/oracle/admin/ICCI/cdump
db_block_size	8192
db_domain
db_file_multiblock_read_count	16
db_name	ICCI
dispatchers	(PROTOCOL=TCP) (SERVICE=ICCIXDB)
instance_number	1
job_queue_processes	10
open_cursors	800
pga_aggregate_target	1073741824
processes	500
remote_listener	LISTENERS_ICCI
remote_login_passwordfile	EXCLUSIVE
sga_max_size	4294967296
sga_target	4294967296
sort_area_size	196608
spfile	/dev/rora_SPFILE
thread	1
undo_management	AUTO
undo_retention	900
undo_tablespace	UNDOTBS1
user_dump_dest	/oracle/app/oracle/admin/ICCI/udump

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More RAC Statistics

• Global Enqueue Statistics
• Global CR Served Stats
• Global CURRENT Served Stats
• Global Cache Transfer Stats

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Global Enqueue Statistics

Statistic	Total	per Second	per Trans
acks for commit broadcast(actual)	18,537	3.92	3.31
acks for commit broadcast(logical)	21,016	4.45	3.75
broadcast msgs on commit(actual)	5,193	1.10	0.93
broadcast msgs on commit(logical)	5,491	1.16	0.98
broadcast msgs on commit(wasted)	450	0.10	0.08
dynamically allocated gcs resources	0	0.00	0.00
dynamically allocated gcs shadows	0	0.00	0.00
false posts waiting for scn acks	0	0.00	0.00
flow control messages received	0	0.00	0.00
flow control messages sent	2	0.00	0.00
gcs assume cvt	0	0.00	0.00
gcs assume no cvt	9,675	2.05	1.73
gcs ast xid	1	0.00	0.00
gcs blocked converts	7,099	1.50	1.27
gcs blocked cr converts	8,442	1.79	1.51
gcs compatible basts	45	0.01	0.01
gcs compatible cr basts (global)	273	0.06	0.05
gcs compatible cr basts (local)	12,593	2.66	2.25
gcs cr basts to PIs	0	0.00	0.00
gcs cr serve without current lock	0	0.00	0.00
gcs dbwr flush pi msgs	223	0.05	0.04
gcs dbwr write request msgs	223	0.05	0.04
gcs error msgs	0	0.00	0.00
gcs forward cr to pinged instance	0	0.00	0.00
gcs immediate (compatible) converts	2,998	0.63	0.54
gcs immediate (null) converts	170,925	36.16	30.53
gcs immediate cr (compatible) converts	0	0.00	0.00
gcs immediate cr (null) converts	722,748	152.88	129.11
gcs indirect ast	306,817	64.90	54.81
gcs lms flush pi msgs	0	0.00	0.00
gcs lms write request msgs	189	0.04	0.03
gcs msgs process time(ms)	16,164	3.42	2.89
gcs msgs received	1,792,132	379.09	320.14
gcs out-of-order msgs	0	0.00	0.00
gcs pings refused	0	0.00	0.00
gcs pkey conflicts retry	0	0.00	0.00
gcs queued converts	2	0.00	0.00
gcs recovery claim msgs	0	0.00	0.00
gcs refuse xid	0	0.00	0.00
gcs regular cr	0	0.00	0.00
gcs retry convert request	0	0.00	0.00
gcs side channel msgs actual	437	0.09	0.08
gcs side channel msgs logical	21,086	4.46	3.77
gcs stale cr	3,300	0.70	0.59
gcs undo cr	5	0.00	0.00
gcs write notification msgs	23	0.00	0.00
gcs writes refused	3	0.00	0.00
ges msgs process time(ms)	1,289	0.27	0.23
ges msgs received	138,891	29.38	24.81
global posts dropped	0	0.00	0.00
global posts queue time	0	0.00	0.00
global posts queued	0	0.00	0.00
global posts requested	0	0.00	0.00
global posts sent	0	0.00	0.00
implicit batch messages received	81,181	17.17	14.50
implicit batch messages sent	19,561	4.14	3.49
lmd msg send time(ms)	0	0.00	0.00
lms(s) msg send time(ms)	0	0.00	0.00
messages flow controlled	15,306	3.24	2.73
messages queue sent actual	108,411	22.93	19.37
messages queue sent logical	222,518	47.07	39.75
messages received actual	474,202	100.31	84.71
messages received logical	1,931,144	408.50	344.97
messages sent directly	25,742	5.45	4.60
messages sent indirectly	137,725	29.13	24.60
messages sent not implicit batched	88,859	18.80	15.87
messages sent pbatched	1,050,224	222.16	187.61
msgs causing lmd to send msgs	61,682	13.05	11.02
msgs causing lms(s) to send msgs	85,978	18.19	15.36
msgs received queue time (ms)	911,013	192.71	162.74
msgs received queued	1,931,121	408.50	344.97
msgs sent queue time (ms)	5,651	1.20	1.01
msgs sent queue time on ksxp (ms)	66,767	14.12	11.93
msgs sent queued	215,124	45.51	38.43
msgs sent queued on ksxp	243,729	51.56	43.54
process batch messages received	120,003	25.38	21.44
process batch messages sent	181,019	38.29	32.34

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Global CR Served Stats

Statistic	Total
CR Block Requests	10,422
CURRENT Block Requests	251
Data Block Requests	10,422
Undo Block Requests	2
TX Block Requests	20
Current Results	10,664
Private results	4
Zero Results	5
Disk Read Results	0
Fail Results	0
Fairness Down Converts	1,474
Fairness Clears	0
Free GC Elements	0
Flushes	370
Flushes Queued	0
Flush Queue Full	0
Flush Max Time (us)	0
Light Works	2
Errors	0

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Global CURRENT Served Stats

• Pins = CURRENT Block Pin Operations
• Flushes = Redo Flush before CURRENT Block Served Operations
• Writes = CURRENT Block Fusion Write Operations

Statistic	Total	% <1ms	% <10ms	% <100ms	% <1s	% <10s
Pins	17,534	99.96	0.01	0.03	0.00	0.00
Flushes	77	48.05	46.75	5.19	0.00	0.00
Writes	255	5.49	53.73	40.00	0.78	0.00

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Global Cache Transfer Stats

• Immediate (Immed) - Block Transfer NOT impacted by Remote Processing Delays
• Busy (Busy) - Block Transfer impacted by Remote Contention
• Congested (Congst) - Block Transfer impacted by Remote System Load
• ordered by CR + Current Blocks Received desc

		CR				Current
Inst No	Block Class	Blocks Received	% Immed	% Busy	% Congst	Blocks Received	% Immed	% Busy	% Congst
2	data block	3,945	87.20	12.80	0.00	13,324	99.71	0.26	0.04
2	Others	191	100.00	0.00	0.00	2,190	96.48	3.52	0.00
2	undo header	11	100.00	0.00	0.00	2	100.00	0.00	0.00

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End of Report