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From "Mitesh Shah" <>
Subject RE: Vmware and Tomcat 5.x & 6.x
Date Tue, 25 Sep 2007 00:36:14 GMT
Thanks Chris for reply. Clarion is SAN, so all are data and OS partitions
are on SAN.

Whole server works fine but our application works using tomcat and I have
installed around 20 instances of tomcats on one virtual machine (2.66GHz and
4GB RAM). On similar line, does JDK takes advantage of two CPU compared to
one CPU?

I can reconfigure Swap file on separate disks than OS disk and see if it
performs better.

Please let me know if above info helps in understanding issue better?

Mitesh Shah
Hosted Services Engineer
-----Original Message-----
From: Christopher Schultz [] 
Sent: Monday, September 24, 2007 6:01 PM
To: Tomcat Users List
Subject: Re: Vmware and Tomcat 5.x & 6.x

Hash: SHA1


Mitesh Shah wrote:
> This is first ever deployment of our product on virtual environment and we
> are facing lots of issues of slowness. There are too many variables to
> monitor and looking for some path to follow. 

Is the whole server slow, or do you notice that certain operations are slow?

> I was hoping to get some input as if anyone is aware of such issue of
> and tomcat.

AFAIK, there are no Tomcat-specific vmware issues. However, there could
be some problems with the JVM in general that you might be coming
across. For instance, if you are using a source of randomness that
blocks when used through the virtual environment, that might cause a
problem. Also, if you are using non-native disks (meaning a big file on
the host OS that holds the entire filesystem for the VM), you may
experience some slowdown, there.

I'm not sure what Clarion is... could that be a problem at all?

- -chris
Version: GnuPG v1.4.7 (MingW32)
Comment: Using GnuPG with Mozilla -


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