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Confusion in memory used details for Linux servers

Hi All,

I am seeing very odd behavior for Linux servers configured via SNMPv2. Below screenshots with details:

Cache, Shared and physical memory is showing 99%

Whereas the radial gauge is showing that total memory used is only 16%...

Another screenshot for type RAM:

I am seeing this across multiple nodes. So any reason why its showing different? Is it calculated separately? OR there is something seriously wrong?

I have alerts set up for disk space of fixed disk above 90% AND also for percent memory used for greater than 90%. We have NPM 12.1, SAM 6.4 and Platform version of 2017.1

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d09h

Try this:

https://support.solarwinds.com/Success_Center/Network_Performance_Monitor_(NPM)/Poller_shows_incorrect_memory_utilization_(UNIX_and_Linux)

Poller shows incorrect memory utilization (UNIX and Linux)

Overview

Memory gauges monitoring UNIX and Linux devices or nodes shows 100% memory utilization via the SolarWinds Web Console.

Environment

All SolarWinds Software Versions that use Memory gauges
With Net-SNMP in use on UNIX and Linux Devices / Nodes

Cause

Select related Device / Node.
Select poller type (memory in this case).
Click Detect Pollers.
Right-click the supported pollers and complete a Poll now.
Check if any of the supported pollers produce the correct / expected results.
Enable this poller by selecting the poller and clicking on Add/Replace Pollers.
Click Yes in the confirmation dialog.
Retest the related gauge(s) via the SolarWinds Website / Web Console, after the next scheduled poll of the related device / node.

pratikmehta003

Hi d09h

Before i try the KB you mentioned can you let me know memory shown in Gauge is total memory or just a single component?

What does total memory compose of? Is it the combination of cache+virtual+buffer+shared+physical.

Emir

FYI, we just put in a feature request to disable auto-discovery of "shared memory" and "cached memory" from Linux systems (i.e. since they always show 99%). Please upvote if you find this feature request useful.

Link: thwack.solarwinds.com/.../inhibit-the-auto-discovery-of-cached-memory-and-shared-memory-in-linux-systems