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I do not understand how the garbage collection would make the
JVM CPU usage jump to 50%.
Could JServ trigger the JVM to jump like that.
If so how? How could I monitor this to see what causes this.
The logs have basically been useless. Do the JServ logs
reflect any messages coming from the JVM?
Are there monitoring tools for NT to determine how this happens?
Don
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Chris
> Cheshire
> Sent: Tuesday, July 25, 2000 9:22 AM
> To: Java Apache Users
> Subject: Re: JVM and 50% CPU usage
>
>
> ----------------------------------------------------------------
> BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
> WHEN YOU POST, include all relevant version numbers, log files,
> and configuration files. Don't make us guess your problem!!!
> ----------------------------------------------------------------
>
> This could be the JVM garbage collecting. I have seen this
> on java apps as well.
>
> Don Pierce wrote:
> >
> > ----------------------------------------------------------------
> > BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
> > WHEN YOU POST, include all relevant version numbers, log files,
> > and configuration files. Don't make us guess your problem!!!
> > ----------------------------------------------------------------
> >
> > So once you enlarged the disk space the problem went away?
> > I have a couple gig available so I guess that is not my problem.
> >
> > Thanks anyway
> >
> > Don
> >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of CN Davies
> > > Sent: Monday, July 24, 2000 11:11 AM
> > > To: Java Apache Users
> > > Subject: Re: JVM and 50% CPU usage
> > >
> > >
> > > ----------------------------------------------------------------
> > > BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
> > > WHEN YOU POST, include all relevant version numbers, log files,
> > > and configuration files. Don't make us guess your problem!!!
> > > ----------------------------------------------------------------
> > >
> > > I Had a similar problem with JavaWebserver when we were running low on
> > > disk space on C: Jrew was dominating the CPU so much it would take 5
> > > minutes to simply log in.
> > >
> > > Chris
> > >
> > > On Sun, 23 Jul 2000 21:28:52 -0700, Don Pierce wrote:
> > >
> > > >----------------------------------------------------------------
> > > >BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
> > > >WHEN YOU POST, include all relevant version numbers, log files,
> > > >and configuration files. Don't make us guess your problem!!!
> > > >----------------------------------------------------------------
> > > >
> > > >I recently installed the following:
> > > >1.3.12 and JServ 1.1.2 on NT4 with JDK 1.1.8
> > > >
> > > >All seems to run fine and the CPU is about 3-5%
> > > >Very low - then at random times it will jump
> > > >to 50% and I find that java.exe is what is
> > > >using it.
> > > >
> > > >I see no real correlation in any of the error logs
> > > >to these CPU jump events. The server still running fine
> > > >but I have had Apache JServ lose it's connection to
> > > >Apache a couple times (usually after a couple hours at 50%).
> > > >I have even had it run at 50% for 2 days and have had no problems.
> > > >
> > > >Anyone seen this before?
> > > >What kind of tools could I use to diagnose the problem?
> > > >The performance monitor does not help much in this case.
> > > >
> > > >Don
> > > >
> > > >
> > > >--
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Chris Cheshire
Manager of Software Development
bigredwire.com
Phone : +1 805 560 6666 (w)
+1 805 559 9166 (m)
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Real Programmers don't draw flowcharts.
Flowcharts are the illiterate's form of
documentation. Cavemen drew flowcharts;
look at how much good it did for them
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