How do I process Concurrent Requests?

How do I process Concurrent Requests?

To process concurrent requests, modify the <worker-thread count> tag.

What is Worker-thread Count? How do I manage it?

• Increase to 200: For a high load server, the count can be 200 or more. If set to a lower value, a lot of requests will be in queue before they can be processed.
• Decrease to 20-30: For a lower request rate with high process time, the count can be set to a lower value as 20 or 30. If set to a higher value, the inactive threads will consume memory and flood the listener socket to check with new requests. This degrades the VM performance.

Note: The value can be decreased to 1/10th of total number requests received at peak loads collected by statistics.

For Web sites with many hits but less processing time, static pages and dynamic pages with lower process times should have high worker thread count. For Web sites having high processing time with comparably low hit rate, the worker thread count value should be lower.

Each request requires a single thread. Concurrent processing of high loads require equal number of threads. Number of threads should be limited to a lower value depending on the OS and available resources.

How do I view Worker-threads?

To view the worker-threads, use the status command at the command shell. This displays the number of threads created and the number of threads in waiting.

If compared to the actual number, the number of waiting threads is high, it means a lot of threads are waiting unnecessarily, which may degrade the performance. This is because of extensive context switches, reduced time slices, and memory consumption. Reducing the thread count improves performance.

If the number of threads that are waiting are low, some requests are either waiting to get processed or are not getting accepted. Increasing the count improves performance.

What is Acceptor-thread Count? How do I manage it?

This value can be modified using the Console. To do this, log on to the Console and select Configure > Web Server. The Connections section displays the current acceptor thread count.

Table 1: Acceptor-thread Count

To change this value, click the Edit icon on the right.

Edit the required values and click Save.

© Pramati Technologies 2007	Runs on Pramati Server | Feedback | Legal