Restarting your application's PHP-FPM pool

Where

Under the "Actions" dropdown on an environment that uses PHP, the button labeled "Restart FPM Pool"

If the action to restart the FPM pool is disabled, you might not have the required permissions.
Please contact the helpdesk if you believe this should not be the case.

What does it do?

This action clears the OPcache for your application. Restarting the FPM pool will temporarily disconnect and prevent new connections to your application¹. This interruption will only last a few seconds. If your application uses Varnish, it is possible it will cache one of these connection failures. In that case, you can clear the Varnish cache using the ‘Clear Varnish’ action.

¹ Currently High-Availability (HA) setups can also experience temporary interruptions. We are working on improving this, so we can guarantee no downtime for HA setups.