WARNING: [pool www] server reached pm.max_children setting (5), consider raising it

Question

I'm getting this error:

WARNING: [pool www] server reached pm.max_children setting (5), consider raising it

When trying to access my XenForo installation at forums.domain.com in my PHP error log.

It happens every time, and I think it's causes PHP to crash, which prevents the other site on the same box from working as well.

I'm using nginx with two server blocks for these two sites. One's under new. and one's under forums..

Thanks.

Answer 1

On Ubuntu 12 (and probably elsewhere), the pm.max_children value is set in the configuration file /etc/php5/fpm/pool.d/www.conf. Search the file for that string and increase the value. Restart PHP for the change to take effect with this command:

 sudo service php5-fpm restart

If you are using Apache, you may need to restart that service first.