Global Memory Usage Test

This test reports how well the NetScaler device uses the memory available to it, tracks shared memory usage by the device, and promptly alerts administrators to abnormal memory usage by the device.

Target of the test : A NetScaler VPX/MPX

Agent deploying the test : A remote agent

Outputs of the test : One set of results for the NetScaler appliance being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the host for which the test is being configured.

NetScaler Username and NetScaler Password

To monitor a NetScaler device, the eG agent should be configured with the credentials of a user with read-only privileges to the target NetScaler device. Specify the credentials of such a user in the NetScaler Username and NetScaler Password text boxes.

Confirm Password

Confirm the NetScaler Password by retyping it here.

SSL

The eG agent collects performance metrics by invoking NITRO (NetScaler Interface Through Restful interfaces and Objects) APIs on the target NetScaler device. Typically, the NITRO APIs can be invoked through the HTTP or the HTTPS mode. By default, the eG agent invokes the NITRO APIs using the HTTPS mode. This is why, the SSL flag is set to Yes by default. If the target NetScaler device is not SSL-enabled, then the NITRO APIs can be accessed through the HTTP mode only. In this case, set the SSL flag to No.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Total memory

Indicates the total memory capacity of the NetScaler device.

MB

 

Total memory available

Indicates the total memory available for use in the packet engine (PE) of this NetScaler device.

MB

 

Memory allocated

Indicates the total amount of memory that is currently allocated to the NetScaler features. 

MB

 

Percent of memory allocated

Indicates the percentage of memory that is allocated to the NetScaler features.

MB

 

Memory in use

Indicates the amount of memory that is currently utilized by the NetScaler device.

MB

A low value is desired for this measure. A consistent increase in this value could be indicative of a potential memory contention.

Percent of memory in use

Indicates the percentage of memory that is currently in use in this NetScaler device.

Percent

Free memory

Indicates the amount of memory that is currently unused in the NetScaler device.

MB

A high value is desired for this measure.

Total shared memory

Indicates the amount of memory that is allocated for sharing by this NetScaler device.

MB

 

Shared memory in use

Indicates the amount of shared memory that is currently in use in this NetScaler device.

MB

Ideally, this value should be low.

Percent of shared memory in use

Indicates the percentage of shared memory that is currently in use in this NetScaler device.

Percent

Ideally, this value should be low.