Magento – SQLSTATE[HY000] [2003] Can’t connect to MySQL server on ‘’

All of a sudden, I started seeing random timeouts and occasional total hangups on a Magento deployment I’m running.

The MySQL server runs on the same machine as the web host, so there shouldn’t be any connectivity issues.

This was solved by editing /etc/mysql/my.cnf and commenting out the line:

bind-address =

Then running sudo service mysql restart.

But, I ended up undoing these changes when I realized that the server itself was critically short on RAM. Allocating more RAM seemed to solve the problem as well, and more reliably.

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