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Date: Thu, 26 Feb 2009 09:20:10 +0100
Message-ID: <327858f40902260020g750a8b81q3c5d10a9262c25f4@mail.gmail.com>
Subject: Re: jsvc degrades performance in production
From: Leon Rosenberg <rosenberg.leon@googlemail.com>
To: Tomcat Users List <users@tomcat.apache.org>
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just a question, if you are behind a loadbalancer, why wouldn't your
just run it as non-root user on a non-privelleged port without jsvc?

regards
Leon

On Thu, Feb 26, 2009 at 3:31 AM, B.V. Prasad <hibvp@yahoo.com> wrote:
> I am running Tomcat 6 on a group of Linux servers behind a loadbalancer. =
This setup was working fine when I ran Tomcat as root. However, when I move=
d to jsvc, the production servers started to become unavailable within a co=
uple of hours, serving thousands of requests. I had to restart them to be o=
nline again, only to get into the same issue in a couple of hours. When swi=
tched back to run as root, things were fine again. I could find no errors i=
n any logs.
>
> I found that jsvc uses client JVM (the servers are server-class VMWare se=
rvers) by default. I am suspecting when I ran as root (startup.sh), Tomcat =
used server JVM that gave better performance, while jsvc performed worse wi=
th client JVM, causing my maxThreads (150) to exhaust, acceptCount (100) to=
 fill up and making tomcat to deny requests. I am guessing if I make jsvc t=
o use server JVM, my problem will go away. I appreciate if someone can vali=
date this theory or offer other clues before I try this in production. Of c=
ourse, I shall also try a stress test case.
>
> Thanks,
> BV Prasad
>
>
>

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