Question

VPS - Ubuntu 12.4 - Mysql service stop automatically every 2days

Posted December 30, 2013 9k views
I am using VPS . with Ubuntu 12.4 (nginx server +mysql) .Am install LEMP with the digitalocean article for installation.. and it works fine.. and then after two days, i get an problem with my site .. (ERROR CONNECTING DATABASE) ..so i have to manually start the mysql service ..(service mysql start) .. So what the problem is ? and how to keep the mysql service live all the time ?
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2 answers
kamaln7 December 30, 2013
Your droplet is running out of memory, try adding swap:

https://www.digitalocean.com/community/articles/how-to-add-swap-on-ubuntu-12-04.
How To Add Swap on Ubuntu 12.04
by Etel Sverdlov
Linux swaps allow a system to harness more memory than was originally physically available. Here's how to set up a linux swap file on Ubuntu 12.04
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pablo December 30, 2013
MySQL can eat up a lot of resources if having to make a lot of calls to the database. To optimize your site and, as a result, get rid of that error, follow the steps outlined in the following guides:

1.) How To Add Swap on Ubuntu 12.04;

2.) How To Install and Use Memcache on Ubuntu 12.04 (see Kamal's comment of Jun. 30, 2013 for instructions on configuring memcache for use with Nginx);

If you're using WordPress, you'll also be interested in:
3.) How To Install Wordpress, Nginx, PHP, and Varnish on Ubuntu 12.04.
How To Install WordPress, Nginx, PHP, and Varnish on Ubuntu 12.04
by Etel Sverdlov
Varnish is an HTTP accelerator and a useful tool for speeding up a server, especially during a times when there is high traffic to a site. It works by redirecting visitors to static pages whenever possible and only drawing on the server itself if there is a need for an active process. This tutorial covers installing wordpress on a LEMP stack (with nginx instead of apache), and then installing varnish.
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