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1、查看当前所有连接的详细资料:
mysqladmin -uroot -proot processlist

D:\MySQL\bin>mysqladmin -uroot -proot processlist
+-----+------+----------------+---------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+-----+------+----------------+---------+---------+------+-------+------------------+
| 591 | root | localhost:3544 | bbs | Sleep | 25 | | |
| 701 | root | localhost:3761 | | uery | 0 | | show processlist |
+-----+------+----------------+---------+---------+------+-------+------------------+

2、只查看当前连接数(Threads就是连接数.):
mysqladmin -uroot -proot status

D:\MySQL\bin>mysqladmin -uroot -proot status
Uptime: 2102 Threads: 3 Questions: 15531 Slow queries: 0 Opens: 0 Flush tab
les: 1 Open tables: 61 Queries per second avg: 7.389

3、修改mysql最大连接数：

查看mysql的最大连接数：?show variables like 'max_connections'?
打开my.ini，修改max_connections=100(默认为100)。

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;

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