Zabbix Server Causing Network Device Latency Hourly

[bdaniel]

Disabling the "use bulk requests" has actually seemed to make the problem worse. All UPS's are now reporting latency spikes over 200ms on a random timeframe.

Does anyone have a suggestion for me? Surely I am not the only person SNMP monitoring Eaton UPS's using Zabbix...

[bdaniel]

The system seemed to behave well during the day yesterday after making the change. However, overnight the same issues have been observed on multiple UPS's....

[bdaniel]

Since disabling the "use bulk requests" checkbox for each UPS I have not noticed any issues. I will continue to monitor this for the next 24 hours.

If this is indeed the solution, is there anyway to disable this setting per host group or per VLAN? Possibly as part of the discovery/action...

[bdaniel]

So, I have disabled each of those discovery rules independently and left for a 24 hour period, I still have the same results each hour on the hour.

Dimir: When I run Wireshark and watch the traffic, there is lots of SNMP get-request and get-response traffic all the time, all appears to...

[bdaniel]

But I just found this (see screenshot) under one of the affected hosts. Could one of these Discovery Rules be putting too much load on the low end network card in the UPS's?...

[bdaniel]

I don't think it is Network Discovery Rules, for a few days I had them (and Actions) completely disabled and this issue was still occuring. I also had them set to 24h with the same result. I have just set all 3 of them to 6h and will see if this does make a difference for some reason...

[bdaniel]

I have changed the interval to 6h and rebooted the server. A bunch of the UPS's just reported the same latency issue at 5min past the hour.

Does anyone else have any suggestions of where to look to solve this issue?

EDIT: Still getting the exact same symptoms every hour, a...

[bdaniel]

Yeah I read something about Housekeeper running hourly but didn't think it would interact with the actual scanning of network devices - it seemed to be more of a db cleanup.

Can I safely disable it as a test?

[bdaniel]

We are currently testing Zabbix to replace our SolarWinds NPM deployment. I have built the server on CentOS 8 following the install documentation using MySQL and have set the server to discover and add hosts from 3 of our internal subnets. The VM has 2 vCPU and 6GB of RAM and at this stage is only monitoring...