Getting Started with WebSphere Application Server

Chapter 10 – Tuning a Community Edition server 187
- Busy Threads Max - The highest number of threads used up to now.
- Busy Threads Min - The lowest number of threads used up to now.
Figure 10.9 - Live statistic information for Web connectors
10.3.3 Configuring the thread pool size
Choosing the optimum value for the thread pool size is important to successfully configure
the Community Edition server for the best performance. Setting this value too low reduces
the throughput because of an increased wait time for a request to be served. Setting it too
high reduces the CPU efficiency because of frequent context switching among the threads.
You must find the proper balance.
You can change thread pool sizes by updating the configuration files. This cannot be done
using the administrative console. To apply the required changes:
1. Stop the Community Edition server.
2. Open the /var/config/config.xml with a text editor.
3. To specify the pool size for DefaultThreadPool, insert the following
element inside the
element. Listing 10.1 provides an example. In the listing,
replace xyz with the pool size value you desire.
5000
xyz
Listing 10.1 - Specifying a DefaultThreadPool size
4. To specify the pool size for ConnectorThreadPool, insert the following
element inside the
element. Listing 10.2 provides an example. In the listing, replace xyz with the pool
size value you desire.