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From "Abhi Karmos" <>
Subject Memory usage Tomcat 3.3 vs 5.5
Date Wed, 19 Apr 2006 20:39:19 GMT

Hello all,

Sorry, could not find an answer on tomcat-users.

We run tomcat inside an embedded system and we are planning to upgrade the
tomcat version from 3.3.1 to 5.5.16. We noticed that the memory footprint of
a barebones tomcat 5.5 installation is 44 MB. Plain and simple Tomcat 3.3
used to run with 25 MB. We have limited memory on our system and the memory
usage of tomcat 5.5 is a concern for us.

The numbers above are the resident set size (RSS) on a linux system. When we
took the above numbers, both the tomcats had the same heap setting (min:
25 - max: 30 mb).

When we run our webapps, which add another 20 jars in the classpath, the
steady state memory usage is 50 MB with Tomcat 3.3 and 66 MB with Tomcat

Has anyone else solved a similar problem before ? Can I try and tweak tomcat
5.5 to run in less memory ? Our server.xml is the minimal configuration


OS: Linux / RedHat 7.3
JVM: IBM 1.4.2 

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