Re: innodb monitor outputPosted by: Jacky Shu Date: November 10, 2009 12:45PM thanks nanda. queries are mostly many tables with millions of rows, typical report. here are the variables, status, and mem config
这里就拿Stand Monitor来说说。 mysql> SHOW ENGINE INNODB STATUS\G *** 1. row *** Status === 030709 13:00:59 INNODB MONITOR OUTPUT === Per second averages calculated from the last 18 seconds --- BACKGROUND THREAD --- srv_master_thread loops: 53 1_second, 44 sleeps, 5 10_...
具体原因可以都通过innodb_table_monitor看出。
3.show engine innodb status\G; mysql>show engine innodb status\G;***1. row***Type: InnoDB Name: Status:===2014-11-0119:43:081024INNODB MONITOR OUTPUT===Per second averages calculatedfromthe last52seconds---BACKGROUND THREAD---srv_master_thread loops:74srv_active,0srv_shutdown,35735srv...
Standard Monitor output is limited to 1MB when produced using theSHOW ENGINE INNODB STATUSstatement. This limit does not apply to output written to tserver standard error output (stderr). Example Standard Monitor output: mysql>SHOWENGINEINNODBSTATUS\G***1. row***Type:InnoDB Name:Status:=== ...
Number of rows inserted 57, updated 354, deleted 4, read 4421 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s --- END OF INNODB MONITOR OUTPUT ===
DROP TABLE innodb_monitor; 基于系统参数:innodb_status_output 自mysql 5.6.16版本之后,可以通过设置系统参数(innodb_status_output)的方式开启或者关闭标准监控。 1 2 set GLOBAL innodb_status_output=ON; set GLOBAL innodb_status_output=OFF; 2. 开启锁监控(InnoDB Lock Monitor) ...
MySQL中如果要查看InnoDB的状态,如果想看到更完整的信息,毫无疑问就是命令show engine innodb status。 当然还有几类查看的方式,比如information_schema中INNODB_XX的数据字典和新版本中的sys schema,里面是可以提供一些InnoDB不同维度的信息,但是相比show engine innodb status命令的输出,这些结果明显要淡薄许多。
InnoDB 多版本控制 为保证并发操作和回滚操作, InnoDB会将修改前的数据存放在回滚段(undo log)中。 InnoDB会在数据库的每一行上额外增加三个字段以实现多版本控制, 第一个字段是DB_TRX_ID用来存放针对该行最后一次执行insert、 update操作的事务ID,而delete操作也会被认为是update,只是会有额外的一位来代表事务为...
Re: innodb monitor output Posted by:Nanda kishore Toomula Date: November 19, 2009 10:41PM Hi Just sharing some ideas with experts to improvise the scope my MySQL skills 1. Best option will be query tuning as rick said, 2. try to avoid limit as much as possible...