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Servers: Monitoring: Threads

Column Display     Related Tasks     Related Topics

This page provides information on the thread activity for the current server.

The first table provides general information about the status of the thread pool. The second table provides information on individual threads.

Note: The user ID displayed for individual threads is the user ID executing the thread during the current stage of the request. This table may display different user IDs during the lifecycle of the thread.

When using Work Managers to prioritize thread execution, WebLogic Server uses a single thread pool, in which all types of work are executed. WebLogic Server prioritizes work based on rules you define, and run-time metrics, including the actual time it takes to execute a request and the rate at which requests are entering and leaving the pool.

The common thread pool changes its size automatically to maximize throughput. The queue monitors throughput over time and based on history, determines whether to adjust the thread count. For example, if historical throughput statistics indicate that a higher thread count increased throughput, WebLogic increases the thread count. Similarly, if statistics indicate that fewer threads did not reduce throughput, WebLogic decreases the thread count. This new strategy makes it easier for administrators to allocate processing resources and manage performance, avoiding the effort and complexity involved in configuring, monitoring, and tuning custom executes queues.

WebLogic Server provides another method for prioritizing and executing threads. This method is used for backward compatibility when using execute queues. In this method, different classes of work were executed in different queues, based on priority and ordering requirements, and to avoid deadlocks. In addition to the default execute queue, weblogic.kernel.default, there were pre-configured queues dedicated to internal administrative traffic, such as weblogic.admin.HTTP and weblogic.admin.RMI.

Column Display

You can show fewer or additional data points on this page by expanding Customize this table and modifying the Column Display list. Each data point displays in its own table column.

The following table lists all of the data points that you can display in columns on this page.

Name Description
Total Requests
Current Request
Work Manager
Active Execute Threads
Execute Thread Total Count
Execute Thread Idle Count
Queue Length
Pending User Request Count
Shared Capacity For Work Managers
Completed Request Count
Hogging Thread Count
Standby Thread Count
Min Threads Constraints Pending
Min Threads Constraints Completed

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