mysqlslap是mysql自帶的基准測試工具，優點:查詢數據,語法簡單,靈活容易使用.該工具可以模擬多個客戶端同時並發的向服務器發出查詢更新,給出了性能測試數據而且提供了多種引擎的性能比較.msqlslap為mysql性能優化前后提供了直觀的驗證依據,建議系統運維和DBA人員應該掌握一些常見的壓力測試工具,才能准確的掌握線上數據庫支撐的用戶流量上限及其抗壓性等問題。
常用的選項
--concurrency 並發數量,多個可以用逗號隔開
--engines 要測試的引擎，可以有多個，用分隔符隔開，如--engines=myisam,innodb
--iterations 要運行這些測試多少次
--auto-generate-sql 用系統自己生成的SQL腳本來測試
--auto-generate-sql-load-type 要測試的是讀還是寫還是兩者混合的（read,write,update,mixed）
--number-of-queries 總共要運行多少次查詢。每個客戶運行的查詢數量可以用查詢總數/並發數來計算
--debug-info 額外輸出CPU以及內存的相關信息
--number-int-cols 創建測試表的int型字段數量
--number-char-cols 創建測試表的chat型字段數量
--create-schema 測試的database
--query 自己的SQL 腳本執行測試
--only-print 如果只想打印看看SQL語句是什么，可以用這個選項
實例1
說明:測試100個並發線程，測試次數1次，自動生成SQL測試腳本，讀、寫、更新混合測試，自增長字段，測試引擎為innodb，共運行5000次查詢
#mysqlslap -h127.0.0.1 -uroot -p123456789 --concurrency=100 --iterations=1 --auto-generate-sql --auto-generate-sql-load-type=mixed --auto-generate-sql-add-autoincrement --engine=innodb --number-of-queries=5000
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.351 seconds 100個客戶端（並發）同時運行這些SQL語句平均要花0.351秒
Minimum number of seconds to run all queries: 0.351 seconds
Maximum number of seconds to run all queries: 0.351 seconds
Number of clients running queries: 100 總共100個客戶端（並發）運行這些sql查詢
Average number of queries per client:50 每個客戶端（並發）平均運行50次查詢（對應--concurrency=100，--number-of-queries=5000；5000/100=50）
實例2
#mysqlslap -h127.0.0.1 -uroot -p123456789 --concurrency=100,500,1000 --iterations=1 --auto-generate-sql --auto-generate-sql-load-type=mixed --auto-generate-sql-add-autoincrement --engine=innodb --number-of-queries=5000 --debug-info
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.328 seconds
Minimum number of seconds to run all queries: 0.328 seconds
Maximum number of seconds to run all queries: 0.328 seconds
Number of clients running queries: 100
Average number of queries per client: 50
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.358 seconds
Minimum number of seconds to run all queries: 0.358 seconds
Maximum number of seconds to run all queries: 0.358 seconds
Number of clients running queries: 500
Average number of queries per client: 10
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.482 seconds
Minimum number of seconds to run all queries: 0.482 seconds
Maximum number of seconds to run all queries: 0.482 seconds
Number of clients running queries: 1000
Average number of queries per client: 5
User time 0.21, System time 0.78
Maximum resident set size 21520, Integral resident set size 0
Non-physical pagefaults 12332, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 36771, Involuntary context switches 1396
實例3(自定義sql語句)
#mysqlslap -h127.0.0.1 -uroot -p123456789 --concurrency=100 --iterations=1 --create-schema=rudao --query='select * from serverlist;' --engine=innodb --number-of-queries=5000 --debug-info
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.144 seconds
Minimum number of seconds to run all queries: 0.144 seconds
Maximum number of seconds to run all queries: 0.144 seconds
Number of clients running queries: 100
Average number of queries per client: 50
User time 0.05, System time 0.09
Maximum resident set size 6132, Integral resident set size 0
Non-physical pagefaults 2078, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 6051, Involuntary context switches 90
實例4(指定sql腳本)
#mysqlslap -h127.0.0.1 -uroot -p123456789 --concurrency=100 --iterations=1 --create-schema=rudao --query=/tmp/query.sql --engine=innodb --number-of-queries=5000 --debug-info
Warning: Using a password on the command line interface can be insecure.
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.157 seconds
Minimum number of seconds to run all queries: 0.157 seconds
Maximum number of seconds to run all queries: 0.157 seconds
Number of clients running queries: 100
Average number of queries per client: 50
User time 0.07, System time 0.08
Maximum resident set size 6152, Integral resident set size 0
Non-physical pagefaults 2107, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 6076, Involuntary context switches 89