设置mysql慢查询
1.建log文件
touch /var/log/mysql-slow.log
chown mysql:mysql /var/log/mysql-slow.log

2.编辑配置文件my.cnf

long_query_time=3
log_slow_queries = /var/log/mysql-slow.log


3.重启mysqld

/etc/rc.d/init.d/mysqld restart