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Message-ID: <6291fc850604191409h3f294ed2p79beec73637d7930@mail.gmail.com>
Date: Wed, 19 Apr 2006 23:09:47 +0200
From: "Henri Gomez" <henri.gomez@gmail.com>
To: "Tomcat Developers List" <dev@tomcat.apache.org>
Subject: Re: Memory usage Tomcat 3.3 vs 5.5
In-Reply-To: <e2675o$ocm$1@sea.gmane.org>
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References: <e2675o$ocm$1@sea.gmane.org>

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 th=
e
> 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 memo=
ry
> 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 tom=
cat
> 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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