Tuning application servers

The Teamcenter web tier manages communication between the Teamcenter clients and the enterprise tier. Tune the web tier to ensure performance. The successful deployment of the Teamcenter web application or Enterprise application is not complete without tuning the application server. The default settings for application servers (for example, WebSphere) are rarely appropriate for production scalability or good transactional performance. Ensure that the applicable application server vendor tuning documentation is followed. Of critical importance are items such as the following: Set any JSP or servlet check intervals to very long values. This prevents unwanted and expensive extraction of these components from the deployed WAR files. In some cases, application servers may be configured by default to check these upon every invocation. That is good for a developer environment but very bad for performance. A good value is on the order of once a day or longer. Tune the application Java Virtual Machine (JVM) run-time parameters appropriate for high transactional throughput (server) applications: Set JVM heap sizes to match the RAM available on the machine, while keeping the size to a limit manageable by the garbage collection (GC) algorithm and the power of the CPU(s) available to implement that algorithm. In this case, both too small and too large are potential performance problems. Select the appropriate garbage collection algorithm to match the number of CPUs available to implement it. Set the JVM heap generational sizes to be appropriate for the GC algorithms and available heap. In all cases, the relevant performance tuning documentation provided by the application vendor and Java Runtime Environment (JRE) should be consulted for optimum tuning values. Each distinct application server has distinct configuration mechanisms. Each major version of the JRE has unique Garbage Collection tuning options available. You can use third-party applications to view web tier administration interface data in a more comprehensive manner.