Why is Prognosis generating “IptDeviceTh: Physical memory used above 80 %-90% range” while “Cisco Expressway” page shows its memory usage is low?

[LindaYu]

Why is Prognosis generating “IptDeviceTh: Physical memory used above 80 %-90% range” while “Cisco Expressway” page shows its memory usage is low?

[LindaYu · Accepted solution]

This is because

- memory usage of the dashboard covers both real physical memory and swap space or virtual memory.

- IptDeviceTh alert is only monitor the real/physical memory installed on this host in KB.

The memory usage window of "Cisco Expressway" dashboard is to monitor CEWUCDME record, PERCUSED (PercentageUsed) value.

PercentageUsed

PERCUSED

BINARY_32,2

AVERAGE

Percentage memory used. This value covers both real physical memory and swap space or virtual memory.

The IptDeviceTh alert is to monitor the real/physical memory installed on this host in KB.

It is triggered if the used physical memory percentage is above 90%

((TOTLPHY - AVALPHY) * 100 / TOTLPHY) > 90

If the result is greater than 90, then the alert is triggered.

TOTLPHY :-

TotalPhysical

TOTLPHY

BINARY_32

AVERAGE

The total amount of real/physical memory installed on this host in KB.

AVALPHY :-

AvailablePhysical

AVALPHY

BINARY_32

AVERAGE

The amount of real/physical memory currently unused or available in KB.