mysql is using 100% cpu and causing establishing database error

my droplet: 4 GB Memory / 80 GB Disk / BLR1 - Ubuntu/ wordpress/ woo commerce I’m getting database error every 2 hour, sometime i can resolve it by restarting the droplet, and sometime i need to restore a backup funny thing that sometimes i don’t do anything and the matter is resolved by itself, but i lose my custom css…i have no idea what is the relation here! but when database error happen, i see that cpu usage is above 100% and i run mysql-tuner and got: [!!] Maximum possible memory usage: 9.9G (257.48% of installed RAM) [!!] Overall possible memory usage with other process exceeded memory

I need help in fining out the solution for cpu 100% I need help in configuration of my.cnf for my droplet: 4GB/ 80GB

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Bobby Iliev
Site Moderator
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June 19, 2022
Accepted Answer

Hi there,

I would suggest a few things:

  • Try following the steps from this tutorial here on how to tweak your MySQL server for better performance:

  • Add a caching plugin for your site so that it would make fewer requests to the database itself.

  • Use a CDN service like Cloudflare to make reduce the overall work that your server has to do.

  • Consider switching to a Managed MySQL database which is optimized for you out of the box:

Let me know if you have any questions!