(1) QPS(每秒Query量) QPS = Questions(or Queries) / uptime mysql> show global status like 'Question%'; mysql> show global status like 'uptime';
(2) TPS(每秒事務量) TPS = (Com_commit + Com_rollback) / uptime mysql > show global status like 'Com_commit'; mysql > show global status like 'Com_rollback'; mysql> show global status like 'uptime';
(3)key Buffer 命中率 mysql>show global status like 'key%'; key_buffer_read_hits = (1-key_reads /key_read_requests) * 100% key_buffer_write_hits = (1-key_writes /key_write_requests) * 100%
(4)InnoDB Buffer命中率 mysql> show status like 'innodb_buffer_pool_read%'; innodb_buffer_read_hits = (1 -innodb_buffer_pool_reads / innodb_buffer_pool_read_requests) * 100%
(5)Query Cache命中率 mysql> show status like 'Qcache%'; Query_cache_hits = (Qcahce_hits /(Qcache_hits + Qcache_inserts )) * 100%;
(6)Table Cache狀態(tài)量 mysql> show global status like 'open%'; 比較 open_tables 與opend_tables值
(7)Thread Cache 命中率 mysql> show global status like'Thread%'; mysql> show global status like'Connections'; Thread_cache_hits = (1 - Threads_created /connections ) * 100%
(8)鎖定狀態(tài) mysql> show global status like '%lock%'; Table_locks_waited/Table_locks_immediate=0.3% 如果這個比值比較大的話，說明表鎖造成的阻塞比較嚴重 Innodb_row_lock_waits innodb行鎖，太大可能是間隙鎖造成的
(9)復制延時量 mysql > show slave status 查看Seconds_Behind_Master的值，如果為0，說明沒有延遲
(10) Tmp Table 狀況(臨時表狀況) mysql > show global status like 'Created_tmp%'; Created_tmp_disk_tables/Created_tmp_tables比值最好不要超過10%，如果Created_tmp_tables值比較大， 可能是排序句子過多或者是連接句子不夠優(yōu)化
(11) Binlog Cache 使用狀況 mysql > show global status like 'Binlog_cache%'; 如果Binlog_cache_disk_use值不為0 ，可能需要調大 binlog_cache_size大小
(12) Innodb_log_waits 量 mysql > show status like'innodb_log_waits'; Innodb_log_waits值不等于0的話，表明 innodblog buffer 因為空間不足而等待
(13)open file and table mysql> show global status like 'Open_files'; mysql> show global status like 'Open_tables';
(14) 慢查詢 開啟慢查詢： 1).手動執(zhí)行命令開啟: mysql> set global slow_query_log=on; mysql> set global long_query_time=1;
