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From "srini" <srini...@ensoftek.com>
Subject Re: Basic question about Apache+Tomcat Memory usage
Date Fri, 07 Sep 2001 19:38:11 GMT
 ho sorry Craig i was talking about CPU usage. I know first time it
translates JSP page in to Java and compiles it. But is it that much
intensive to eat 80-100% of memory ??
        Iam running my application on Apache+Tomcat. For many of the pages
it takes 90-100% even though they are not first time visiting pages. It has
Database connections. what is the problem ?? do i need to check the code or
what .......?

  Thnaks  Craig .

-srini


----- Original Message -----
From: "Craig R. McClanahan" <craigmcc@apache.org>
To: <tomcat-user@jakarta.apache.org>
Sent: Friday, September 07, 2001 12:10 PM
Subject: Re: Basic question about Apache+Tomcat Memory usage


> Are you asking about CPU usage or memory usage?
>
> For CPU, the first time you access a page (or whenever you update it),
> Tomcat has to translate the page into Java and then compile it.  This is a
> pretty CPU-intensive activity, but it only happens once.
>
> For memory, there is a lot to understand about the way JVMs work -- but
> basically, from the operating system point of view, the JVM will start out
> at whatever you have configured as the minimum heap size, grow as it needs
> to, and never give it back (although from *inside* the JVM there will be
> free memory that can be reused for new Java object creation).  You can
> control the overall memory usage with command line parameters -- see the
> Java documentation for more info.
>
> Craig
>
>
> On Fri, 7 Sep 2001, srini wrote:
>
> > Date: Fri, 7 Sep 2001 12:14:28 -0700
> > From: srini <srinivas@ensoftek.com>
> > Reply-To: tomcat-user@jakarta.apache.org
> > To: tomcat-user@jakarta.apache.org
> > Subject: Basic question about Apache+Tomcat Memory usage
> >
> > hi users,
> >         i have  this basic question in mind from so many days but din't
get
> > an answer for it.
> >          when i try to execute a simple JSP or Servlet , generally first
> > time my CPU usage goes to 80-100%.I tried with default examples which
comes
> > with Tomcat. where as i have seen big application which don't use that
much
> > memory even u do some heavy jobs.
> >  Why is it so ???
> >
> >  System configuration:
> >         Pentium3    900mHz processor   256MB Ram.
> >         Operating system:  win2K
> >         Tomcat 3.2.2
> >
> > Thanks in advance.
> >
> > -srini
> >
> >
>
>


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