Definition of Disk Volumes -> Shared memory on a Linux system

On my SUSE Linux Enterprise 11 (64-bit) system, under:

Disk Volumes, there's a value Shared memory that is set at 100%. I believe that value is /dev/shm/ and it has plenty of free memory.
Can somebody explain the definition of that value is?

Also, I know there are other threads about incorrect polling for memory utilization, such as this one:

Poller shows incorrect memory utilization (UNIX and Linux) - SolarWinds Worldwide, LLC. Help and Support

But attempting to follow these instructions, I'm having some confusion:

Select poller type (memory in this case).
Click Detect Pollers.
Right-click the supported pollers and complete a Poll now.

The only part I see Pollers is in Management -> Pollers and there's also a Poll Now. But pressing Poll Now doesn't change the results.

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d09h

I would query the MIB (via SNMPwalk) from the SUSE server itself and be content as long as SolarWinds showed the same thing as SUSE.

http://www.net-snmp.org/docs/mibs/ucdavis.html

13 memShared INTEGER32 ReadOnly .1.3.6.1.4.1.2021.4.13

The total amount of real or virtual memory currently allocated for use as shared memory. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.

ecklerwr1

From my experience shared memory is always 100% Also if you use the linux agent it provides more accurate stats I believe for linux.

aLTeReGo

This information comes from > http://www.net-snmp.org/docs/mibs/host.html#hrStorageTable

Emir

FYI, we just put in a feature request to disable "shared memory" and "cached memory" from auto-discovery. 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