crud统计数
show status like 'com_select';
show status like 'com_insert';
show status like 'com_update';
show status like 'com_delete';
查看慢查询
show variables like '%slow_query%';
show variables like '%quer%';
show global variables like '%long_query%';
连接相关
# 查看试图连接到mysql的连接数(不管是否成功)
show status like 'connections';
show status like '%Connection%';
show variables like '%max_connections%';
#当前连接数
show processlist;
show status like 'Threads%';
查看表数量
# 某个库下的所有表
select * FROM information_schema.TABLES WHERE table_schema = '$db';