Buffer Cache Test

This test monitors the usage of the system's buffer cache.

This test is disabled by default. To enable the test, go to the enable / disable tests page using the menu sequence : Agents -> Tests -> Enable/Disable, pick the desired Component type, set Performance as the Test type, choose the test from the DISABLED TESTS list, and click on the << button to move the test to the ENABLED TESTS list. Finally, click the Update button.

Target of the test : A Solaris

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

Parameter	Description
Test Period	How often should the test be executed.
Host	The host for which the test is to be configured.

Measurements made by the test

Measurement	Description	Measurement Unit	Interpretation
Cache lookups	Indicates the number of lookups to the buffer cache during the last measurement period.	Number
Cache hits:	Indicates the number of hits from the buffer cache during the last measurement period.	Number
Buffer cache hit ratio:	Indicates the ratio of cache hits to total lookups during the last measurement period.	Percent	A value close to 90% is good.
Buffers locked:	Indicates the number of buffers locked during the last measurement period.	Number
New buffer requests:	Indicates the number of new buffer requests issued during the last measurement period.	Number
Waits for buffer allocations:	Indicates the number of buffer allocation requests during the last measurement period that had to wait	Number	This value should be close to 0 for optimal operation.