关于MySQL中TPS和QPS的计算方式

TPS - Transactions Per Second(每秒传输的事物处理个数),即服务器每秒处理的事务数,如果是InnoDB会显示,没有InnoDB就不会显示。
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)MyISAM 引擎
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;

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