How does Smarts calculate the FreeMemoryPct value on Hosts?

Products

• VMware

Environment

VMware Smart Assurance - SMARTS

Resolution

How does Smarts calculate the FreeMemoryPct value on Hosts?
How is FreeMemoryPct Calculated on Smarts Hosts?




To calculate the FreeMemoryPct value on Hosts, the following are the OIDs are polled:

        hrStorageSize                    =  1.3.6.1.2.1.25.2.3.1.5
        hrStorageUsed                  =  1.3.6.1.2.1.25.2.3.1.6
        hrStorageAllocationUnits   =  1.3.6.1.2.1.25.2.3.1.4
        hrStorageDescr                 =  1.3.6.1.2.1.25.2.3.1.3

Based on polling results for these OIDs, the following calculations used to derive the value for FreeMemoryPct:

FreeMemoryPct = FreeMemory * 100 / (TotalMemory + 0.001)

TotalMemory = long(hrStorageSize * (float(hrStorageAllocationUnits) / 1024.0));

FreeMemory = long((hrStorageSize - hrStorageUsed) * (float(hrStorageAllocationUnits) / 1024.0));