oracle查询语句内存占用,查询最占资源、CPU、内存、和执行最长的SQL语句
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--当前执行sql语句
select a.SID,
a.SERIAL#,
a.USERNAME,
b.PARSE_CALLS,
b.PARSING_SCHEMA_NAME,
b.CPU_TIME/1000000,
b.ELAPSED_TIME/1000000,
b.DISK_READS,
b.DIRECT_WRITES,
b.BUFFER_GETS,
a.event,
b.sql_text,
b.SQL_FULLTEXT
from v$session a inner join v$sqlarea b
on a.SQL_HASH_VALUE = b. hash_value and b.PARSING_SCHEMA_NAME=upper('smsdb')
--物理读最高sql语句
select a.USERNAME,
a. USER_ID,
b.PARSE_CALLS,
b.PARSING_SCHEMA_NAME,
b.CPU_TIME/1000000,
b.ELAPSED_TIME/1000000,
b.DISK_READS,
b.DIRECT_WRITES,
b.BUFFER_GETS,
b.sql_text,
b.SQL_FULLTEXT
from dba_users a inner join v$sqlarea b
on a.USER_ID = b.PARSING_USER_ID and b.PARSING_SCHEMA_NAME=upper('smsdb') and disk_reads>1000000
--查询前10名执行最多次数SQL语句
select sql_text "SQL语句", executions "执行次数"
from (select sql_text,
executions,
rank() over
(order by executions desc) exec_rank
from v$sqlarea)
where exec_rank <= 10;
--查询前10名占用CPU最高的SQL语句
select sql_text "SQL语句",
c_t "SQL执行时间(秒)",executions "执行次数",cs "每次执行时间(秒)" from (select sql_text,
cpu_time /1000000 c_t,executions,ceil(executions/(cpu_time/1000000))cs,
rank() over(order by cpu_time desc) top_time
from v$sqlarea) where top_time <= 10
--查询前10名执行时间最长SQL语句
select sql_text "SQL语句",
c_t "处理时间(秒)",executions "执行次数",cs "每次执行时间(秒)"
from (select sql_text,
ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,
rank() over(order by ELAPSED_TIME desc) top_time
from v$sqlarea) where top_time <= 10
--查询前10名最耗资源SQL语句
select sql_text "SQL语句",
DISK_READS "物理读次数",cs "每次执行时间(秒)"
from (select sql_text,
ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,DISK_READS,
rank() over(order by DISK_READS desc) top_disk
from v$sqlarea) where top_disk <= 10
--查询前10名最耗内存SQL语句
select sql_text "SQL语句",
BUFFER_GETS "内存读次数",cs "每次执行时间(秒)"
from (select sql_text,
ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,BUFFER_GETS,
rank() over(order by BUFFER_GETS desc) top_mem
from v$sqlarea) where top_mem <= 10
--查看锁表语句
Select
c.sid,
c.serial#,
d.name,
b.object_name,
c.username,
c.program,
c.osuser
from gv$Locked_object a, All_objects b, gv$session c, audit_actions d
where a.object_id = b.object_id
and a.inst_id = c.inst_id(+)
and a.session_id = c.