Ntopng causes high cpu load on host machine

Support
1

NethServer Version: ns7 rc3
Module: ntopng

Hi guys,

I recognized that ntopng causes high cpu load on the host machine of a vm. The VM itself doesn’t report this.
The moment I enable the service on the vm the cpu load increases about 15-20 % (red arrow) and stays that high.

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When I stop the service cpu load drop down to normal value.

I found also that pf_ring service has failed, which is a part of ntopng. Could this be the reason?

With systemctl list-units --type=service I find 3 failed services:

pf_ring.service
systemd-tmpfiles-clean.service
systemd-tmpfiles-setup.service

2

ntopng requires a lot of resources, it has to inspect all network traffic.
AFAIK, pfring is not used on NethServer.

3

Maybe this is vm related. I’m using virtualbox with bridged interfaces. On the “real server” on ns6.8 ntop causes only a few percent (1 to 3) of load as htop reports.