Load Evaluator Index Test

A server’s load index may be the aggregate of:

  • Various computer performance counter based metrics, namely CPU, Memory and Disk Usage
  • Session Count

It is designed to indicate how suitable a XenApp Worker is to receive a new user session. It is the Delivery Controller’s responsibility to calculate the load index based on the aggregate of the normalized load rule indexes generated by the various load rules. As only the Delivery Controller can determine the session load, a server’s overall load index is calculated on the Delivery Controller and not the Virtual Delivery Agent.

Administrators can use the Load Evaluator Index test to periodically evaluate the load on the servers managed by a delivery group. This is imperative to ensure that load is uniformly balanced across the servers. In addition, in times of an overload, this test can help administrators accurately identify which server is overloaded and which resource is the constraint.

Target of the test : A Citrix Delivery Controller 7.x

Agent deploying the test : An internal agent

Outputs of the test : One set of results for server OS machine managed by the broker.

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 this test is to be configured.

Port

Refers to the port at which the specified host listens to.

Username

In order to monitor the target Delivery Controller 7, eG requires a special user with the following privileges;

  • The All scope and read-only privileges
  • The Allow log on locally security privilege on the Delivery Controller host

The steps for assigning such privileges to a user are discussed in the Pre-requisites for monitoring the Citrix Delivery Controller 7.x. Specify the name of such a user, here.

Password

Specify the password for the user specified in the Username text box, here.

Confirm Password

Confirm the Password by retyping it here.

Domain

Here, specify the domain to which the user specified in the Username text box belongs to.

Report by Delivery Group

By default, this flag is set to No indicating that this test reports metrics for every server OS machine in each delivery group configured on the broker. You can set this flag to Yes if you want this test to group the machines by delivery group and display the delivery groups as the primary descriptors. In this case, expanding a delivery group will reveal the secondary descriptors, which are the server OS machines.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise suite embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Effective load evaluator index

Indicates the load evaluator index of this machine.

Percent

By comparing the value of this measure across server OS machines, you can figure out whether or not load is uniformly balanced across all servers.

Use the detailed diagnosis of this measure to view the complete details of this machine and to view the CPU, disk, memory, and session load evaluator index of the machine.

CPU load evaluator index

Indicates the CPU load evaluator index of this server OS machine.

Percent

A high value is indicative of excessive CPU usage by the machine over time.

Memory load evaluator index

Indicates the memory load evaluator index of this server OS machine.

Percent

A high value is indicative of excessive memory usage by the machine over time.

Disk load evaluator index

Indicates the disk load evaluator index of this server OS machine.

Percent

A high value is indicative of excessive disk usage by the machine over time.

Session load evaluator index

Indicates the session count load evaluator index of this server OS machine.

Percent

A high value indicates that the machine has been consistently handling many user sessions.

Use the detailed diagnosis of the Effective load evaluator index measure to view the complete details of this machine and to view the CPU, disk, memory, and session load evaluator index of the machine.

Figure 1 : The detailed diagnosis of the Effective load evaluator index measure