status = show status like ‘%%' [例:show status like 'Com_select'] variables = show variables like ‘%%' [例:show variables like 'query_cache_size'] 1、MySQL查询次数(status) Com_select;Com_update;Com_insert;Com_delete;Com_change_db
status = show status like ‘%%' [例:show status like 'Com_select']variables = show variables like ‘%%' [例:show variables like 'query_cache_size']
1、MySQL查询次数(status)Com_select;Com_update;Com_insert;Com_delete;Com_change_db
2、查询缓存空间大小:query_cache_size(variables)查询缓存最大查询数据集大小:query_cache_limit(variables);缓存中的查询个数:Qcache_inserts(status);查询缓存命中率：（Qcache_hits/(Qcache_hits+Qcache_inserts)）*100% (status)
3、索引缓存命中率索引缓存空间大小：key_buffer_size (variables)索引缓存命中率：(Key_reads/Key_read_requests)*100% (status)
4、并发连接数最大充许连接数:max_connections(variables)实际最大连接数:max_used_connections(status)当前连接数:Threads_connected(status)活跃连接数：Threads_running(status)缓存连接数：Threads_cache(status)
5、流量统计(status)Bytes_received ,Bytes_sent(status)
6、连接次数每秒连接次数:Connections(status)每秒实际创建连接次数：Threads_created(status)
7、表锁定统计立即释放的表锁数：Table_locks_immediate(status)需要等待的表锁数：Table_locks_waited(status)
