php-fpm: pool nginx (php-fpm) eats all CPU

[Topogigio]

@kiokoman it's a production node so it's hard :( And to disable a VTI requires to unassign the interface, and so on, I cannot simply disable the P1.

Meantime I've found a small workaround. I noticed in logs many events related to "change of dynamic IP address" related to my IPSEC tunnels (please note that I work only with static IPs). This triggered some kind of refresh of configuration, and php started to consume all CPU during that refresh.
So I disable monitoring on all tunnels, and this mitigate the problem because it seems that pfSense does not reload configuration many times every day as before. Still the problem is on, so if I manually save changes and reload config it starts to eat CPU