vi /etc/my.cnf

Delete what ever present inside and paste the below in that.

[mysqld]
socket=/var/lib/mysql/mysql.sock
#skip-locking — disabled by default
#skip-innodb — only when all tables are MyISAM
skip-name-resolve # saves dns resolution time.
query_cache_limit=1M
query_cache_size=64M
query_cache_type=1
max_connections=500
interactive_timeout=75
wait_timeout=25
connect_timeout=10

thread_cache_size=128
key_buffer=256M
sort_buffer_size=2M
read_buffer_size=2M ## sort+read x connections + key = memory usage
join_buffer=2M
max_allowed_packet=16M
table_cache=1024
record_buffer=2M
thread_concurrency=8
myisam_sort_buffer_size=64M
#log-bin
server-id=1

[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=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[myisamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

/etc/rc.d/init.d/mysql restart

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