Swap Test

Swap space is space on a hard disk used as the virtual memory extension of a computer's real memory (RAM). The least recently used files in RAM can be "swapped out" to the hard disk until they are needed later so that new files can be "swapped in" to RAM. Having an appropriate amount of swap space is important for optimal system performance.

Target of the test : A Solaris, Linux, AIX or HPUX system only

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every server being monitored

Configurable parameters for the test
  1. Test period - How often should the test be executed
  2. Host - The host for which the test is to be configured.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Swap used

Indicates the total swap space that is either allocated or reserved.

MB

 

Swap allocated

Indicates the total swap space currently allocated for use as a backing store.

MB

This measure is not available for HPUX systems.

Swap reserved

Indicates the total amount of swap space not currently allocated but claimed for future use.

MB

This measure is not available for AIX and HPUX systems.

Swap available

Indicates the total swap space that is currently available for future reservation and allocation.

MB

 

Swap used percent

Indicates the percentage of swap space that is allocated or reserved.

Percent

A value close to 100% indicates that the swap space configured may not be sufficient. A value close to 0 may imply that the swap space configured may be too large.

Swap queue

Indicates the number of processes swapped out currently.

Number

Ideally, this value should be close to 0. This measure is not available for AIX systems.