OpenCms, written in Java and running as a servlet, is a resource-intensive application. Because of the nature of the content management process, OpenCms uses many synchronized objects—the cost of synchronization is decreased performance. While a fast processor and lots of memory are necessary for good performance, there are some small software adjustments that can help squeeze a little more performance out of the system. One of the easiest and most common ways to increase the performance of a Java application is to adjust the memory settings for the JVM as already discussed in Chapter 2. Let's move on to discuss the other ways.
OpenCms supports several databases, including SQL Server, MySQL, and Oracle. Each database has different methods of tuning, and there are books and manuals that deal with this subject for each of them. However, there are a few common performance issues that continually come up in OpenCms discussions, and I will talk about those here...