[z/OS]

Troubleshooting using WebSphere variables

Troubleshooting problems can be performed by changing certain variables in your application environment.

Before you begin

WebSphere® Application Server for z/OS® provides configuration variables that control server behavior.
  • Configuration variables may be set on a cell, node, or server level.
    • Variable values set on a cell level apply to all servers in all nodes in the cell, unless a different value for the same variable is set on a node or server level. Variable settings on a node or server level override values for the same variable set at the cell level.
    • Variables set on a node level apply to all servers in the node, unless a different value for the same variable is set on the server level. Variable settings on a server level override values for the same variable set at the node or cell level.
    • Variables set on a server level apply only to the specific server, not to any other servers in the same node or cell.
    Note: When you are diagnosing particular problems, you are most likely to alter variable values on a server level, for a particular server. Specifying variable values on the server level affects both the controller and servant regions.
  • You may use scripting interfaces, instead of the administrative console, to alter configuration variable values.
  • These variables allow you to control:
    • Output destinations and characteristics for the error log, and for CTRACE buffers, data sets and the external writer.
    • Trace buffers, data sets, and the content of trace data.
    • Types of dumps to be requested.
    • Timeout values for system and application behavior.

About this task

Depending on the types of problems you encounter, you might need to change the values set for configuration variables that control WebSphere Application Server behavior. Generally speaking, the default values are designed for normal operation in a production environment. Other circumstances might require different values:
  • When you first customize and verify WebSphere Application Server for z/OS installation, or
  • When you test application workloads in a test environment, or
  • when you encounter a problem, and need to collect more diagnostic data.
The following procedure explains how to use the administrative console to change configuration variable values, commonly known as console settings.

Procedure

  1. Click Environment -> Manage WebSphere Variables in the console navigation tree.
  2. On the WebSphere Variables page, select Server as the scope of the variable setting, and click Apply.
  3. On the WebSphere Variables page, click New.
  4. On the Variable page, specify a name and value for the variable. So other people can understand what the variable is used for, also specify a description for the variable. Then click OK.
  5. Verify that the variable is shown in the list of variables.
  6. Save your configuration.
  7. To have the configuration take effect, stop the server and then start the server again.

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時間戳記圖示 前次更新: July 9, 2016 11:17
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