MySQL性能调优过程总结

1.show  full processlist;

可用于生产环境现场查看哪些锁存在。

2show innodb status;

用于查看死锁。

3.slow log

用户查看慢查询

4.show status

用户调优my.cnf参数，具体详见

修改参数示例：

set global  key_buffer_size=1073741824;
'key_buffer_size'
set global  table_open_cache=2048;
show variables like 'table_open_cache';
show variables like 'open-files- limit';
set global   query_cache_size=128M;
set global  table_open_cache=1024;
set global  max_connections=00;
max_connections=800
Opened_tables
key_buffer_size
show status like 'key_read%';
SHOW STATUS LIKE 'Qcache%'
show variables like 'innodb_buffer_pool_size';
 innodb_buffer_pool_size
show variables like 'read_buffer_size';

根据status信息对MySQL服务器进行优化（一）

根据status信息对MySQL服务器进行优化（二）

5.案例

完美时空国内游戏服务器的mysql优化

LINUX系统架设征途服务端服务器的教程--征途服务端论坛

Chambon <bernard.chambon@ stripped> wrote:

> Can somebody tell me if 'key_buffer' and 'key_buffer_size' are the same variables ?

Yes. _size is deprecated.

> Perhaps it is just a question of syntax, I mean, in the my.cnf
>    you write  key_buffer=100M
> or you write  set-variable = key_buffer_size=100M

It's the same. "set-variable" is deprecated, so use the first syntax instead.

> Same question for
>  sort_buffer and sort_buffer_size,
>  thread_cache and thread_cache_size,
>  innodb_buffer_pool and innodb_buffer_pool_size
> etc.

All the same :-)

'key_buffer' 和'key_buffer_size'  是一样的意思