High CPU usage every one minute: php-fpm: pool nginx

[msim]

What could lead to high CPU usage every one minute?

pfsense Plus 23.05.1 on ESXi 8.0 U2

I've tested the same pfsense configuration with pfsense CE 2.6.0 and pfsense CE 2.7.0 on two different ESXi 8.0 U2 hosts - the same issue. So it should be something in my configuration

What could run sh -c /sbin/route -n4 get default 2>/dev/null | /usr/bin/awk '/gateway:/{print $2}' and sh -c /sbin/route -n6 get default 2>/dev/null | /usr/bin/awk '/gateway:/{print $2}' every one minute at the same time (it starts around minute +20 seconds and stops around minute +30-35 seconds)

[msim]

I found the issue. It's the Configuration Synchronization (XMLRPC Sync). This pfsense receives some configuration sync from another pfsense (CA, certificates, Authentication Servers) and that leads to high CPU usage every one minute.
But it's pretty weird because such configuration has been working for at least 10 years.

Any ideas what could be the reason?