Oracle 9i JVM Test

The JVM test is used to analyze overall JVM performance for the processes of an Oracle 9i AS instance. The JVM metrics provide useful information about threads and heap memory allocation. You should check these values to make sure that JVM resources are utilized within expected ranges.

Target of the test : An Oracle 9i Application Server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every Oracle 9i AS instance 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.
Port	In the Port text box, it is recommended that you provide the port at which the OPMN (Oracle Process Manager and Notification) process of the Oracle application server instance listens. To know at which port OPMN listens, click on the Ports tab in the following URL: http://<oraHttpServerIP>:<OraHttpServerport>. This tab lists the port numbers that were assigned to the services executing on the Oracle application server. The port number displayed against the Oracle notification server request port entry is the OPMN port, and the same should be specified in the Port text box.
HomeDir	The absolute path of the directory in which the Oracle 9i application server has been installed.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
Active thread groups	Indicates the current number of active thread groups in the JVM.	Number	A high value for this measure is indicative of a high load on the JVM.
Active threads	Indicates the current number of active threads in the JVM.	Number	A high value for this measure is indicative of a high load on the JVM.
Free heap	Indicates the unused memory in the JVM.	MB	The free heap value governs the performance of the JVM. A low value could result in excessive garbage collection, slowing down responses/processing in the JVM.
Min free heap	Indicates the low water mark of memory in the JVM since it started.	MB	This metric indicates the time when the free heap reached its minimum value.
Heap usage	Indicates the used memory in the JVM currently.	MB	A very high value for this measure indicates heavy load on the JVM.
Max heap usage	The high water mark of heap used in the JVM since it was started.	MB	A very high value for this measure indicates heavy load on the JVM.
JVM availability	Indicates the availability of the Oracle 9i AS instance.	Percent	If this value is 100%, then it indicates that the JVM is running. If it is 0, it indicates that the JVM is not available or is not running.