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root@myserver:~# dd if=/dev/zero of=/swap.dat bs=1024 count=512k
root@myserver:~# mkswap /swap.dat
root@myserver:~# swapon /swap.dat
root@myserver:~# vim /etc/fstab
vim is started to edit, add the following to the end of /etc/fstab file

/swap.dat      none    swap    sw      0       0
Then, edit the mysql config file

root@myserver:~# vim /etc/mysql/my.cnf
And add this under [mysqld]

innodb_buffer_pool_size=64M
Finally reload mysql

root@myserver:~#  service mysqld reload