Can't establish database connection-server problem

Posted February 1, 2015 2.1k views

Can’t establish database connection.. I got this message 2-3 times perday .. Can anyone help for this

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This is not an uncommon issue if you are running a full LAMP stack on a 512MB or 1GB droplet. Droplets do not have swap space enabled by default so if your processes exhaust the physical memory available to your droplet some services may crash. There are three things you can do to resolve this:

1.) Upgrade to a larger droplet.
2.) Enable a swapfile on your droplet.
3.) Optimize MySQL and the other services running on your droplet.

by Justin Ellingwood
Swap space can be used as an "overflow" area for your system when you run out of RAM. The operating system can store data that would normally be kept in RAM on the hard drive in a specially formatted file. In this guide, we'll demonstrate how to create and use one of these files in Ubuntu 14.04.