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From "Henri Gomez" <henri.go...@gmail.com>
Subject Re: Memory usage Tomcat 3.3 vs 5.5
Date Wed, 19 Apr 2006 21:09:47 GMT
We're also using TC 3.3 on our production systems and are switching to TC 5.5.

The memory penalty is real but you'll be using up to date and actively
maintained stuff with TC 5.5.

Also you could try to reduce the AJP13 / HTTP 11 threads and remove
some JMX Listeners

2006/4/19, Abhi Karmos <akarmakar@hotmail.com>:
>
> 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
> 5.5.
>
> 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
> possible.
>
> Regards,
> Abhi.
>
> OS: Linux / RedHat 7.3
> JVM: IBM 1.4.2
>
>
>
>
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