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From André Warnier>
Subject Re: Virtual Machine 100% CPU utilisation
Date Fri, 14 May 2010 12:00:33 GMT

Clarke, Dominic wrote:
> Hello,
> When are using Tomcat 5.5.20 on a Windows 2003 SP2 Virtual Machine (for
> running Business Objects XI v3.1 front end) we experiencing 100 CPU
> utlilisation.  However we have found that installing the same set up on
> a physical machine causes no such problem.
> Looking at a few web Bulletin Boards I sense there is a probrem with the
> Java that this version of Tomcat uses
Before going any further, check this :
You will see that there is a rather wide range of Java versions under 
which Tomcat 5.5 will run.
So maybe you want to first just use another Java version (without 
changing anything else) and see if that solves the problem.
(Basically any Java 1.5 or 1.6 version; the recommendation being that 
you use the latest one available, such as Java 1.6.17 I think).
Make sure after installation of the new Java, that the paths which you 
see in the configuration program match the correct ones for Java.
(It may be even better to de-install Tomcat, update Java, and re-install 
Tomcat, so that the Tomcat installer finds things again by itself).
And as long as you do this, you may also want to use Tomcat 6.0 (the 
current version), instead of 5.5 which is quite old already.

  and Virtual Machines, however if I
> make any changes using the default Tomcat configuration program  (i.e.
> changing  the Intial or max memory pools or the Thread stack size on the
> Java Tab) the service fails to start.
You may want to indicate which parameters exactly you tried to change, 
and to what value you tried to set them, and what error messages you see 
exactly and where.
Without this information, it is hard to help.

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