Out Of Memory? Or Memory Leak

I seem to have server crashes every 24-48 hours, the server memory keeps climbing up until the server runs out of memory then kills off the children.

I can fix the problem by restarting php5-fpm but I don’t want to keep doing that.

It is just using a LEMP stack with Wordpress Buddypress but I suspect there may be a memory leak?

I am already using a 4gb Swap file on a $10 vps. Any ideas?


Show comments

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Hello, all

What you can also do is to use the MySQLTuner script. in order to make sure that your MySQL config is using the recommended values against the available resources on your server.

The MySQLTuner is a script written in Perl and allows you to quickly test your MySQL configuration and it gives you suggestions for adjustments to increase performance and stability.

According to the official GitHub page, it supports 300 indicators for MySQL/MariaDB/Percona Server in this last version.

To run the script you could do the following:

  • SSH to your Droplet
  • Download the script:
wget -O
  • Then execute it:

The script would run multiple checks against your MySQL instance, all checks done by MySQLTuner are documented here.

Also as stated in the official documentation, it is still extremely important for you to fully understand each change you make to a MySQL database server. If you don’t understand portions of the script’s output, or if you don’t understand the recommendations, you should consult a knowledgeable DBA or system administrator that you trust.

As a good practice make sure to always test your changes on staging environments before implementing them on your production database.

On the same note, if you want to have a worry-free MySQL hosting and focus on your application, I would recommend trying out the DigitalOcean Managed Databases:

This was mini tutorial was posted from bobbyiliev in this question in our community:

Hope that this helps! Regards, Alex

Without logs and more details is hard to say the cause, 4gb SWAP is terrible big and won’t resolve your problem.

Try adding some caching to your droplet/site with Cloudflare - Varnish, and Total Cache plugin, also use APC for mysql caching. Be sure that PHP-FPM is optimized, maybe you have too much memory and processes assigned to it, which doesn’t mean it will be able to handle more traffic.