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From "Martin Denham" <mjden...@gmail.com>
Subject Re: 4 second page response time
Date Tue, 24 Jul 2007 15:48:33 GMT
Sorry, I mean Alexander!

On 24/07/07, Martin Denham <mjdenham@gmail.com> wrote:
>
> Hi Jesse,
>
> I thought the ContextLoaderListener would just be called once on startup.
> Does it do something on every request?
>
> Martin
>
> On 24/07/07, Jesse Alexander (KSFD 121) <alexander.jesse@credit-suisse.com>
> wrote:
> >
> >  I remember that long time ago I did a comparision for the same
> > reason...
> > and we found out, that the xml-processing on the solaris box was WAY
> > slower than on the
> > Win-Box.
> > We never really found out why, though...
> >
> > regards
> > Alexander
> >
> >  ------------------------------
> > *From:* Martin Denham [mailto:mjdenham@gmail.com]
> > *Sent:* Tuesday, July 24, 2007 4:48 PM
> > *To:* MyFaces Discussion
> > *Subject:* Re: 4 second page response time
> >
> > Thanks for the tips but our sys admins weren't keen on doing a kill and
> > because I only get performance problems on the central Solaris server it was
> > tricky to follow your advice.  I checked for missing tld/xsd warnings and we
> > aren't getting any even though, as you guessed, the Solaris server does not
> > have internet access.
> >
> > However, I have managed to find another of our jsf applications which
> > did not have the 4/8 second page response delay and so I slowly migrated
> > this to be more like the troublesome application.
> >
> > The main problem occurs when I include
> >     <listener>
> >         <listener-class>
> >             org.springframework.web.context.ContextLoaderListener
> >         </listener-class>
> >     </listener>
> > in web.xml.  Yes, the problem also occurs if I use ContextLoaderServlet
> > too.
> >
> > After including ContextLoaderListener performance deteriorates
> > considerably from 2 second response to more than 4 even if I don't load any
> > spring contexts.
> >
> > Has anybody any idea why ContextLoaderListener slows down my application
> > running on Weblogic 8.1 on Solaris?
> >
> > Many thanks.
> >
> > Martin
> >
> > On 23/07/07, David Delbecq <delbd+jakarta@oma.be> wrote:
> > >
> > > En l'instant précis du 20/07/07 15:02, Martin Denham s'exprimait en
> > > ces
> > > termes:
> > > > I have had a performance issue with both the JSF applications I have
> > > > written.
> > > >
> > > > On my windows xp development pc responses are instant.  However when
> > > > deployed to a Sun Ultra 80 Solaris machine every page takes 4
> > > seconds
> > > > and if I add a redirect the response time increases to 7 seconds.
> > > > Another application on the same Solaris machine, but written using
> > > > Struts has instant page response times.
> > > >
> > > > Is a simple page response time of 4 seconds expected when using JSF?
> > >
> > > > I have tried all sorts of tweaks during the past year but the
> > > response
> > > > time is unaffected.
> > > Simple answere: no. I will have to profile your application to find
> > > out
> > > where your CPU bottleneck (if it's a CPU bottleneck) is, or where your
> > >
> > > network bottleneck is. Because JSF uses value binding which can do
> > > lots
> > > of things, any badly written/badly used bean can be at cause (like a
> > > bean loading 50.000 items for a database at each request).
> > > Simple suggestion:
> > > when you load a JSF page, go in a console to your solaris station and
> > > run a kill -3 <JVMpid>, this will dump to the jvm's stdout a
> > > stacktrace
> > > of all running threads. From there you could see where the code is
> > > waiting / busy.
> > >
> > > could it be some xml parser uses a xsd/dtd which is not available. If
> > > production server is firewalled, maybe the server is just trying to
> > > download the schema/dtd and finishes on a timeout of approx 4 seconds?
> > >
> > > >
> > > > I am using Myfaces & tomahawk 1.1.5,  Weblogic 8.1sp4, Facelets
> > > > 1.1.12.  One application uses Oracle ADF and the other
> > > Ajax4Jsf/Richfaces.
> > > >
> > > > Thanks in advance for any pointers.
> > > >
> > > > Martin
> > > >
> > > >
> > >
> > >
> > > --
> > > http://www.noooxml.org/
> > >
> > >
> >
>

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