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update for FPM, much more common in 2015
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Dylan Tack
Dylan Tack
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You need to make sure the number of MySQL connections (max_connections in my.cnf) is greater than the number of PHP processes (MaxClientspm.max_children if you use php-fpm, or MaxClients if you're using Apache mod_php).

The default for Apache is often 300, and the MySQL default is only 100, so you can run out of connections pretty quickly if these values aren't tuned.

You need to make sure the number of MySQL connections (max_connections in my.cnf) is greater than the number of PHP processes (MaxClients if you're using Apache).

The default for Apache is often 300, and the MySQL default is only 100, so you can run out of connections pretty quickly if these values aren't tuned.

You need to make sure the number of MySQL connections (max_connections in my.cnf) is greater than the number of PHP processes (pm.max_children if you use php-fpm, or MaxClients if you're using Apache mod_php).

The default for Apache is often 300, and the MySQL default is only 100, so you can run out of connections pretty quickly if these values aren't tuned.

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Dylan Tack
Dylan Tack
  • 3.1k
  • 14
  • 17

You need to make sure the number of MySQL connections (max_connections in my.cnf) is greater than the number of PHP processes (MaxClients if you're using Apache).

The default for Apache is often 300, and the MySQL default is only 100, so you can run out of connections pretty quickly if these values aren't tuned.