Excessive resource usage: varnishlog

Hi!
Since I've installed Varnish (together with Nginx, Apache & PHP-FPM), I get an email every hour with »

Code: [Select]

Time:         Mon Dec 10 12:18:19 2018 +0100
Account:      varnishlog
Resource:     Process Time
Exceeded:     27038 > 1800 (seconds)
Executable:   /usr/bin/varnishncsa
Command Line: /usr/bin/varnishncsa -a -w /var/log/varnish/varnishncsa.log -D -P /run/varnishncsa/varnishncsa.pid
PID:          3460 (Parent PID:3460)
Killed:       No
and the exeeded time get longer and longer…
Do we really need this varnishncsa for varnish to work?
Can I stop & disable this process or is it necessary?

Thank you!
Ben

you can whitelist it here

/etc/csf/csf.pignore
exe: /usr/bin/varnishncsa