Mysql Server Stops Very Frequently in Digital Ocean Droplet

I created droplet in Digital Ocean With Debian 7. After 10 Days Mysql Server Stop Very Frequently in Digital Ocean Every day. I also use command service mysql restart and nothing happened.

So i try this solution

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:~# nano /etc/fstab

And edit fstab, add the following code

/swap.dat      none    swap    sw      0       0

And add this under [mysqld]

innodb_buffer_pool_size=64M

Finally reload mysql

root@myserver:~#  service mysql reload

Thanks i hope this will help you.. :D