作者：adu | 来源：互联网 | 2014-06-09 00:50
经常用到的mysql性能指标一，获取mysql用户下的进程总数ps-ef|awk'{print$1}'|grep"mysql"|grep-v"grep"|wc-1二，主机性能状态#uptime[root@~]#uptime13:05:52up...
经常用到的mysql性能指标
一，获取mysql用户下的进程总数
ps -ef | awk &＃39;{print $1}&＃39; | grep "mysql" | grep -v "grep" | wc-1
二，主机性能状态
# uptime
[root@ ~]# uptime
13:05:52 up 53 days, 52 min, 1 user, load average: 0.00, 0.00, 0.00
三，CPU使用率
# top
或
# vmstat
四，磁盘IO量
# vmstat 或 # iostat
www.2cto.com
五，swap进出量[内存]
# free
(1)QPS(每秒Query量)
QPS = Questions(or Queries) / seconds
mysql > show /*50000 global */ status like &＃39;Question&＃39;;
(2)TPS(每秒事务量) www.2cto.com
TPS = (Com_commit + Com_rollback) / seconds
mysql > show status like &＃39;Com_commit&＃39;;
mysql > show status like &＃39;Com_rollback&＃39;;
(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 &＃39;Key%&＃39;;
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(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 &＃39;innodb_buffer_pool_read%&＃39;;
(5)Query Cache命中率
Query_cache_hits = (Qcahce_hits / (Qcache_hits + Qcache_inserts )) * 100%;
mysql> show status like &＃39;Qcache%&＃39;;
(6)Table Cache状态量
mysql> show status like &＃39;open%&＃39;;
(7)Thread Cache 命中率
Thread_cache_hits = (1 - Threads_created / connections ) * 100%
mysql> show status like &＃39;Thread%&＃39;;
mysql> show status like &＃39;Connections&＃39;;
(8)锁定状态
mysql> show status like &＃39;%lock%&＃39;;
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(9)复制延时量
mysql > show slave status
(10) Tmp Table 状况(临时表状况)
mysql > show status like &＃39;Create_tmp%&＃39;;
(11) Binlog Cache 使用状况
mysql > show status like &＃39;Binlog_cache%&＃39;;
(12) Innodb_log_waits 量
mysql > show status like &＃39;innodb_log_waits&＃39;;
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