Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Performance Tuning Guide

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### Thread Pool (pwc-thread-pool)

The Admin Console provides the following thread pool statistics:

- Idle/Peak/Limit: Idle indicates the number of threads that are currently idle. Peak indicates the peak number in the pool. Limit indicates the maximum number of native threads allowed in the thread pool, and is determined by the setting of `NativePoolMaxThreads`.

- Work Queue Length /Peak /Limit: These numbers refer to a queue of server requests that are waiting for the use of a native thread from the pool.

  - The Work Queue Length is the current number of requests waiting for a native thread.

  - Peak is the highest number of requests that were ever queued up simultaneously for the use of a native thread since the server was started. This value can be viewed as the maximum concurrency for requests requiring a native thread.

  - Limit is the maximum number of requests that can be queued at one time to wait for a native thread, and is determined by the setting of `NativePoolQueueSize`.

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