I run LibreNMS on a production environment with 37 routers and switches. So far it has been working very well and we have integrated it with oxidized, graylog and rocketchat. However every once in a while I notice that the eventlog shows some MySQL fields changed to NULL values. This is followed by a message saying that “polling took longer than 5 minutes for device”.
I understand from this, that the smnp polling is reaching a timeout value and the database is updated with NULL values because the poller did not return anything usefull.
My question is, is there a way to check the time it takes for a given device to complete its snmp cycle, so that I may configure a more apropriate value for this timeout.
Thank you in advance and keep up the great work!