LAMP实用小技巧之MySQL性能监控(1)(2)

六，数据库性能状态

(1)QPS(每秒Query量)

QPS = Questions(or Queries) / seconds

mysql > show /*50000 global */ status like 'Question';

(2)TPS(每秒事务量)

TPS = (Com_commit + Com_rollback) / seconds

mysql > show status like 'Com_commit';

mysql > show status like 'Com_rollback';

(3)key Buffer 命中率

key_buffer_read_hits = (1-key_reads / key_read_requests) * 100%

key_buffer_write_hits = (1-key_writes / key_write_requests) * 100%

mysql> show status like 'Key%';

(4)InnoDB Buffer命中率

innodb_buffer_read_hits = (1 - innodb_buffer_pool_reads / innodb_buffer_pool_read_requests) * 100%

mysql> show status like 'innodb_buffer_pool_read%';

(5)Query Cache命中率

Query_cache_hits = (Qcahce_hits / (Qcache_hits + Qcache_inserts )) * 100%;

mysql> show status like 'Qcache%';

(6)Table Cache状态量

mysql> show status like 'open%';

(7)Thread Cache 命中率

Thread_cache_hits = (1 - Threads_created / connections ) * 100%

mysql> show status like 'Thread%';

mysql> show status like 'Connections';

(8)锁定状态

mysql> show status like '%lock%';

(9)复制延时量

mysql > show slave status

(10) Tmp Table 状况(临时表状况)

mysql > show status like 'Create_tmp%';

(11) Binlog Cache 使用状况

mysql > show status like 'Binlog_cache%';

(12) Innodb_log_waits 量

mysql > show status like 'innodb_log_waits';

开源监控软件

一，RRDTool

二，Nagios

三，MRTG

四，Cacti

通过文章的介绍，我们又学会一个LAMP的使用技巧，希望大家能喜欢。

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