3 Replies Latest reply on Sep 17, 2009 6:38 AM by robertcbrowning

    Memory usage charts do not match

    otatzmann May 19, 2009 3:40 AM

      Hello,

      maybe the answer is the same like in >100% Usage, but in that case the chart description seems to be wrong.

      A colleague told me that the memory utilization chart seems to be wrong for his Win2003 Server, so I compared all physical memory charts for this server and thy do not really match

       

      Here is the chart for the generall memory utilization

       

       

      Here are the two charts from the "physical Memory drive"

       

       

      So the shapes look similar, but the values are differnt - why?

      the "physical drive" seem to have the correct values.

      BR

      Oliver

        • Re: Memory usage charts do not match
          Yann
          Yann May 19, 2009 5:09 AM (in response to otatzmann)

          Hi Oliver,

          The "Memory" Usage and the "Physical Memory" Utilization are calculated differently by Orion NPM.

          Memory:

          The Memory is the sum of the memory used by the processes listed in the HOST-RESOURCES-MIB:hrSWRunPerfTable (1.3.6.1.2.1.25.5.1).

          The OID used is the hrSWRunPerfMem (1.3.6.1.2.1.25.5.1.1.2).

          Physical Memory:

          The Physical Memory is calculated based on the values populated in the HOST-RESOURCES-MIB:hrStorageTable (1.3.6.1.2.1.25.2.2.3).

          The OIDs used are hrStorageSize (1.3.6.1.2.1.25.2.3.1.5), hrStorageUsed (1.3.6.1.2.1.25.2.3.1.6) and hrStorageAllocationUnits (1.3.6.1.2.1.25.2.3.1.4) .

          Depending how the SNMP agent on the host is reporting values, it can lead to some discrepancies between the two results.

          I would advise you to use the most accurate between both and unmanage the other element.

          Results will vary depending of the plaftorms.

          I hope this helps you.

          Regards,

          Yann