Linux下Cpanel主机如何优化MySQL？

1. 备份 my.cnf 文件
   # cp /etc/my.cnf /etc/my.cnfbackup
2. 编辑 my.cnf 文件 
   #nano -w /etc/my.cnf 
   加入以下代码或替换现有 my.cnf 文件 ：
   
   [mysqld]
   
   datadir=/var/lib/mysql
   socket=/var/lib/mysql/mysql.sock
   skip-locking
   skip-innodb
   query_cache_limit=8M
   query_cache_size=256M
   query_cache_type=1
   max_connections=500
   max_user_connections=10
   interactive_timeout=20
   wait_timeout=20
   connect_timeout=6
   thread_cache_size=128
   key_buffer=16M
   join_buffer=1M
   max_allowed_packet=16M
   table_cache=1024
   record_buffer=1M
   sort_buffer_size=2M
   read_buffer_size=2M
   max_connect_errors=10
   # Try number of CPU's*2 for thread_concurrency
   thread_concurrency=4
   myisam_sort_buffer_size=64M
   #log-bin
   server-id=1
   
   [mysql.server]
   user=mysql
   basedir=/var/lib
   
   [safe_mysqld]
   err-log=/var/log/mysqld.log
   pid-file=/var/lib/mysql/mysql.pid
   open_files_limit=8192
   
   [mysqldump]
   quick
   max_allowed_packet=16M
   
   [mysql]
   no-auto-rehash
   #safe-updates
   
   [isamchk]
   key_buffer=32M
   sort_buffer=32M
   read_buffer=16M
   write_buffer=16M
   
   [myisamchk]
   key_buffer=32M
   sort_buffer=32M
   read_buffer=16M
   write_buffer=16M
    
3. CTRL + X 保存文件并退出
4. 重启 apache.
   # service httpd restart