Having this problem once a week or so and never seem to find anything in my php error logs that would relate to such a massive spike which often runs two hours or more (until I restart php-fpm).
Saw someone posted about changing pm.max children settings, but I don’t have those in my fpm config?
Any other tips? I paid RT to tweak all the settings a few months back, but not sure if these spikes are because something was missed or that usage has increased too much for my capacity. (40 GB disc with 4 GB swap.)