I have two virtual servers for hosting my web app. They are identical, running Debian 6 with 1.5GB of RAM. I configure the OS and Tomcat using a script from a fresh install, so I know they are identical. My webapp runs in Tomcat and I set 850M heap and 100M perm size. My app regularly dies on one of
Tag: jvm
32-bit to 64-bit jvm migration – jboss web application & linux server
We are migrating our Java EE / JBoss web application currently running on 32-bit linux box & 32-bit JVM to 64-bit linux box & 64-bit JVM. We analyzed & changed the JVM heap, permgen, stack etc., sizes appropriately. Is that enough or should we consider any other parameters/ make any other changes as a part of the 64bit migration? We
How do I know if my server has NUMA?
Hopping from Java Garbage Collection, I came across JVM settings for NUMA. Curiously I wanted to check if my CentOS server has NUMA capabilities or not. Is there a *ix command or utility that could grab this info? Answer I’m no expert here, but here’s something: Box 1, no NUMA: Box 2, some NUMA: