Tomcat near 100% use on Windows 2008
Posted on 2013-01-28
We have a Windows 2008 R2 virtual machine on an ESXi server. It only runs one application that requires Apache, Tomcat, Java and PostgreSQL. We have the latest versions of these programs. The machine has 1TB of disk space and 8GB of RAM. When I start the Tomcat 7 service, it starts using around 95% of CPU in a span of a minute, after which the total utilization of CPU by the machine is 100%. Process Explorer shows that the number of threads for this process goes up to 91 and one of them shows over 15,000,000 Cycles Delta and uses all the CPU. While the machine is stalled by Tomcat, the commit charge for the machine is at 12% and physical memory usage at 25%, only the CPU is maxed out.
I added CATALINA_OPTS=-Xms4096m -Xmx512m to the Environment Variables, but it doesn't seem to help. I believe there is a memory leak here, but not sure how to pinpoint it using free tools and patch this leak.