关于MySQL的TPS和QPS

TPS - Transactions Per Second（每秒传输的事物处理个数），这是指server每秒处理的事务数，支持事务的存储引擎如InnoDB等特有的一个性能指标。

计算方法：

TPS = (COM_COMMIT + COM_ROLLBACK)/UPTIME

use information_schema;
select VARIABLE_VALUE into @num_com from GLOBAL_STATUS where VARIABLE_NAME ='COM_COMMIT';
select VARIABLE_VALUE into @num_roll from GLOBAL_STATUS where VARIABLE_NAME ='COM_ROLLBACK';
select VARIABLE_VALUE into @uptime from GLOBAL_STATUS where VARIABLE_NAME ='UPTIME';
select (@num_com+@num_roll)/@uptime;

QPS - Queries Per Second（每秒查询处理量）同一时候适用与InnoDB和MyISAM 引擎

计算方法：

QPS=QUESTIONS/UPTIME

use information_schema;
select VARIABLE_VALUE into @num_queries from GLOBAL_STATUS where VARIABLE_NAME ='QUESTIONS';
select VARIABLE_VALUE into @uptime from GLOBAL_STATUS where VARIABLE_NAME ='UPTIME';
select @num_queries/@uptime;