a) if you're polling through a firewall, it's probably the firewall being useless
b) check the cpu/memory/etc usage of the observium server during these periods

Does the large gap coincide with when devices are being discovered?

24 poller threads is not a lot, but you don't say how many devices you have or how long polling usually takes.

In general the most common things that cause this are:

a) firewall rate limits blocking communication
b) mysql connection limits being hit preventing poller from running
c) excessive pollers being executed preventing anything from completing for a period of time

c) will be visible on cpu/memory/poller graphs
b) will be visible on mysql connection graphs and probably in logs

Are the devices being marked as down? For what reason? ping or snmp?

adam.

Kevin Riahi via observium wrote on 2024-08-20 18:58:

Tim,
Yes it seems so. A closer look also shows other shorter periods when this happens. Please see attached.
The large gap seems to happen between  06:45 and 08:10 and I don't see that here.


   Thank you

Kevin Riahi

From: "Timothy Stoddard" <testoddard@ualr.edu>
To: "Observium" <observium@lists.observium.org>
Cc: "Kevin Riahi" <kevin.riahi@envoi.com>
Sent: Tuesday, August 20, 2024 1:38:24 PM
Subject: Re: [Observium] Observium stops displaying stats for all monitored hosts for a period of time

Was your poller still running during that same time period? Click on the gear and select polling information. You should see graphs of polling statistics.

--
Tim

On Tue, Aug 20, 2024 at 12:21 PM Kevin Riahi via observium <observium@lists.observium.org> wrote:
Hello Team,
It seems Observium stops displaying stats for all (most) monitored hosts for a period of time and then back to normal.!!!
I've attached a few screenshots.
Has this behavior been documented in the past? If not what is the best way to debug this.

Observium ver 24.8.13606
Running on a dedicated server.
12 Core Xeon Proc
64 GB RAM
Raided SSD drives.


   Thank you

Kevin Riahi

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