MySQL优化

慢查询是记录查询超过mysql阀值的sql语句。默认2s。不建议设置过长
mysql> show variables like '%slow%';
+---------------------+-----------------------------------------------------------------------------------------------------+
| Variable_name       | Value                                                                                               |
+---------------------+-----------------------------------------------------------------------------------------------------+
| log_slow_queries    | ON                                                                                                  |
| slow_launch_time    | 2                                                                                                   |
| slow_query_log      | ON                                                                                                  |
+---------------------+-----------------------------------------------------------------------------------------------------+
打开慢查询：
set global slow_query_log = on;
查看记录：

mysql> show global status like'%slow%';
+---------------------+-------+
| Variable_name       | Value |
+---------------------+-------+
| Slow_launch_threads | 0     |
| Slow_queries        | 0     |
+---------------------+-------+

如果数据库访问量很大，可以适当提高max_connection限制。
查询使用连接：
mysql> show global status like 'max_used_connections';
+----------------------+-------+
| Variable_name        | Value |
+----------------------+-------+
| Max_used_connections | 1     |
+----------------------+-------+
理想比例：max_used_connections / max_connections * 100% ≈ 85%

http://www.001pp.com/chengxuyouhua/mysql%20xingnengyouhua2183.html

二进制文件：

打开：在my.ini的mysqld目录下加入log-bin。重启mysql服务。
mysql> show global variables like '%log_bin%';
+---------------------------------+-------+
| Variable_name                   | Value |
+---------------------------------+-------+
| log_bin                         | ON    |
| log_bin_trust_function_creators | OFF   |
| log_bin_trust_routine_creators  | OFF   |
| sql_log_bin                     | ON    |
+---------------------------------+-------+



Mysql优化：
http://net.tutsplus.com/tutorials/other/top-20-mysql-best-practices/

二进制日志管理：
http://www.blogjava.net/dongbule/archive/2010/09/04/331050.html

InnoDB优化
http://man.ddvip.com/database/innodbzh/9.htm