Memory Alerts while Memory Usage is below threshold

A (passive agent connected) Windows 2019 node with 80-83% memory used (according to the OS and the physical memory resource of the node) is the source of the alert "Node is in a Critical State": Node -> Vital stats: 95% memory used.

BUT: Any other details shows the correct value (see picture). So how can the node report 95% when the physical memory reports the correct 83%?
Virtual memory usage is even lower.

Also the Alarm used is a duplicate of "Node is in a Critical State", with the condition that the condition needs to exist for at least 15min, poll every 1 min and reset when the alert condition is resolved.

Find more posts tagged with

Alert

Memory

Accepted answers

JoachimT

I managed to "fix" this problem with deleting the agent and reinstall it again.

All comments

stuartd

I take it from the screenshot that this is a *nix based server??

SolarWInds pollers don't play nice (or vice-versa) with *nix boxes as it doesn't understand the concept of "memory used but available". Technically, SolarWinds is accurately reporting the right free RAM, just it isn't helpful in terms of alerts.

For a fuller understanding read this: Help! Linux Ate my RAM.

SOLUTION: you will need to create a custom poller (or potentially find one on THWACK - we don't monitor servers so can't advise] that does a memory calculation or formula as pollers call it which looks like:

To get those, you'll need to identify the OIDs for those two aspects for your device.

HTH?

JoachimT

No, its a "(passive agent connected) Windows 2019 node " as I wrote above
The Red Hat NIC comes from the Hypervisor.

What puzzles me is that the detail about the memory clearly shows 83%, while the node itself shows 95% memory used.

stuartd

I did say we don't do servers

My guess then is that this is likely down to the different OIDs being used between the node and the poller.

JoachimT

Could you please help me to troubleshoot the OIDs? We use a passive agent (I'm forced to use it passive by our company policy).