# vi /etc/my.cnf
#opteron 852 4GB RAM [mysqld] safe-show-database max_connections = 500 key_buffer = 150M myisam_sort_buffer_size = 64M join_buffer_size = 1M read_buffer_size = 1M sort_buffer_size = 1M table_cache = 1024 thread_cache_size = 100 wait_timeout = 300 connect_timeout = 10 max_allowed_packet = 16M max_connect_errors = 10 query_cache_limit = 1M query_cache_size = 32M query_cache_type = 1 skip-innodb thread_concurrency=4 [mysqld_safe] open_files_limit = 8192 [mysqldump] quick max_allowed_packet = 16M [myisamchk] key_buffer = 64M sort_buffer = 64M read_buffer = 16M write_buffer = 16M[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock skip-locking #skip-networking safe-show-database query_cache_limit=1M query_cache_size=128M ## 32MB for every 1GB of RAM query_cache_type=1 max_user_connections=200 max_connections=500 interactive_timeout=10 wait_timeout=20 connect_timeout=20 thread_cache_size=128 key_buffer=256M ## 64MB for every 1GB of RAM join_buffer=1M max_connect_errors=20 max_allowed_packet=16M table_cache=1024 record_buffer=1M sort_buffer_size=4M ## 1MB for every 1GB of RAM read_buffer_size=4M ## 1MB for every 1GB of RAM read_rnd_buffer_size=4M ## 1MB for every 1GB of RAM thread_concurrency=4 ## Number of CPUs x 2 myisam_sort_buffer_size=64M server-id=1 log_slow_queries=/var/log/mysql-slow-queries.log long_query_time=2 collation-server=latin1_general_ci old-passwords [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 [mysqlhotcopy] interactive-timeout