# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html [mysqld] # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # ns=1000 # sort_buffer_size = 2M # read_rnd_buffer_size = 2M #datadir=/var/lib/mysql datadir=/data/mysql/data socket=/var/lib/mysql/mysql.sock #skip-grant-tables //免身份认证，忘记密码的情况下重置密码很管用 default_password_lifetime=0 sql_mode = '' # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 #log-error=/var/log/mysqld.log #pid-file=/var/run/mysqld/mysqld.pid log-error=/data/mysql/logs/mysqld.log //mysql系统日志,包括启动错误日志 pid-file=/data/mysql/mysqld.pid #server-id=2 //如果开启llog-bin，就需要设置server-id #master-host=119.28.44.164 #master-user=backup #master-password=Syhuo.net2018 #master-port=3306 #master-connect-retry=60 #replicate-do-db=zhihuo #max_allowed_packet = 50M #log-bin=/data/mysql/logs/log-bin.log #expire_logs_days = 15 #增加federated引擎的支持 federated #开启慢查询日志 #slow-query-log-file="/data/mysql/slowlog/slowlog.log" #slow_query_log=1 #long_query_time=0 #log-queries-not-using-indexes
#max_connections=20000 //优化参数，mysql sleep进程, too many connections abort connections 可以通过show processlist查看mysql进程,kill id暴力断开连接， max_allowed_packet=10M wait_timeout=28800 interactive_timeout=28800
[root@izbp18dv3a3metugyd02qxz run]# free
total used free shared buff/cache available
Mem: 15732560 2032016 4969812 15732 8730732 13348568
Swap: 0 0 0
说明：配置足够高，可以
max_allowed_packet=10M
wait_timeout=28800
interactive_timeout=28800
设置，也不会adbort connections ，lost connection ,错误可以log-error=/data/mysql/logs/mysqld.log tail -f 监控到
减少sleep进程措施
1. 程序中，不使用持久链接，即使用mysql_connect而不是pconnect。
2. 程序执行完毕，应该显式调用mysql_close
3. 只能逐步分析系统的SQL查询，找到查询过慢的SQL,优化之