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查询Mysql状态
#查询数据库连接show full processlist;show status like '%Max_used_connections%';show status like '%Threads_connected%';#当前连接数show status like '%table_lock%';#表锁定show status like 'innodb_row_lock%';#行锁定show status like '%qcache%'; #查询缓存情况show variables like "%query_cache%";SHOW STATUS LIKE 'Qcache%'; show variables like "%binlog%";show status like 'Aborted_clients';#由于客户没有正确关闭连接已经死掉，已经放弃的连接数量show variables like '%max_connections%';show variables like '%timeout%';show variables like 'log_%'; #查看日志是否启动
