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MySql如何查看连接数和状态_MySQL

May 31, 2016 am 08:50 AM

bitsCN.com show processlist; 

show status like '%下面变量%'; 

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怎么进入mysql命令行呢? mysql的安装目录下面有个bin目录,先用命令行进入该目录,然后用 mysql -uroot -p123456 来登录(注意:用户名和密码不用包含“”) 
命令: show processlist; 
如果是root帐号,你能看到所有用户的当前连接。如果是其它普通帐号,只能看到自己占用的连接。 
show processlist;只列出前100条,如果想全列出请使用show full processlist; 
mysql> show processlist; 
命令: show status; 
命令:show status like '%下面变量%'; 
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。 
Aborted_connects 尝试已经失败的MySQL服务器的连接的次数。 
Connections 试图连接MySQL服务器的次数。 
Created_tmp_tables 当执行语句时,已经被创造了的隐含临时表的数量。 
Delayed_insert_threads 正在使用的延迟插入处理器线程的数量。 
Delayed_writes 用INSERT DELAYED写入的行数。 
Delayed_errors 用INSERT DELAYED写入的发生某些错误(可能重复键值)的行数。 
Flush_commands 执行FLUSH命令的次数。 
Handler_delete 请求从一张表中删除行的次数。 
Handler_read_first 请求读入表中第一行的次数。 
Handler_read_key 请求数字基于键读行。 
Handler_read_next 请求读入基于一个键的一行的次数。 
Handler_read_rnd 请求读入基于一个固定位置的一行的次数。 
Handler_update 请求更新表中一行的次数。 
Handler_write 请求向表中插入一行的次数。 
Key_blocks_used 用于关键字缓存的块的数量。 
Key_read_requests 请求从缓存读入一个键值的次数。 
Key_reads 从磁盘物理读入一个键值的次数。 
Key_write_requests 请求将一个关键字块写入缓存次数。 
Key_writes 将一个键值块物理写入磁盘的次数。 
Max_used_connections 同时使用的连接的最大数目。 
Not_flushed_key_blocks 在键缓存中已经改变但是还没被清空到磁盘上的键块。 
Not_flushed_delayed_rows 在INSERT DELAY队列中等待写入的行的数量。 
Open_tables 打开表的数量。 
Open_files 打开文件的数量。 
Open_streams 打开流的数量(主要用于日志记载) 
Opened_tables 已经打开的表的数量。 
Questions 发往服务器的查询的数量。 
Slow_queries 要花超过long_query_time时间的查询数量。 
Threads_connected 当前打开的连接的数量。 
Threads_running 不在睡眠的线程数量。 
Uptime 服务器工作了多少秒。bitsCN.com
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