Huge gaps in graphs

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Component Version
LibreNMS 22.3.0-3-g9c127bfd4
DB Schema 2022_02_03_164059_increase_auth_id_length (235)
PHP 7.4.3
Python 3.8.10
MySQL 10.3.34-MariaDB-0ubuntu0.20.04.1
RRDTool 1.7.2
SNMP 5.8

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Hello,

We have a main Librenms server and an additional poller as Docker.

We seem to have huge gaps in all our graphs, please advise. These are all SNMP.

Thanks

Your pollers can not keep up with the work needed. Check the load of the servers in question and increase worker threads / servers as needed. Check the load after increasing these values. You do not want to overload the server. Another possibility is that your devices are too slow to respond.

Yeah those 2 servers CPUs are 95-99%, the main server has 16 vCPUs and the poller 12VCPUs.

Do I add another poller or increase the vCPUs?

How do I check the worker threads please?

That depends on your physical server hardware. If you actually have available resources on the physical host, you may increase the amount of vCPUs but do not overallocate resources. Another solution would be to spin up another poller on another host. You can check the amount of poller / discovery threads from the Settings → Poller → Settings. You can try to increase the thread amount a little (like 10 - 20 %) and see how the server handles the load. If you change these settings, you need to restart the poller service. You should at least monitor the load averages a while when doing this - if the server hangs or the load is too high, you need to get faster hardware or spin up another poller server preferably on another physical host.

Hi Gonzo, could you share what values you have in poller page (http://[your_librenms_instance]/poller)
and do you have a pop up concerning unpolled devices from time to time ?

Sure, I’ve added another poller today:

OK it seems to have decreased your polling time by half, but still your polling time should be below 300 sec for a given poller.

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