How can I solve error "SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)"

I have a 512MB Digital Ocean droplet running on CentOS 6.5 and using Zpanel as my control panel. In it i have hosted 2 web apps, 1 Laravel 4 and the other WordPress and they both work fine only that from time to time i get the following errors which resolve temporarily when i reboot my VPS.


Zpanel: Critical Error: [0100] - Unable to connect or authenticate to the ZPanel database (zpanel_core). We advice that you contact the server administator to ensure that the database server is online and that the correct connection parameter are being used.

Laravel: SQLSTATE[HY000] [2002] Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

WordPress: Error establishing a database connection

How can i permanently solve this.

Thanks in advance.

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.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

The most common reason that MySQL will crash or become unavailable on a 512MB droplet is a lack of available memory. Droplets do not have swap space by default and the requirements for a LAMP stack, especially when running a control panel, can exhaust the available memory and cause services to crash.

You can check your available memory with:

free -m

If you find that you are low on memory you can try enabling a swap file on your droplet, optimize your MySQL configuration, or upgrade to a larger droplet plan.