Re: [Javaserver-perl] Re: JavaServer dies when under heavy load

[<ma...@zz...>]

Hey if blackdown works best for you guys then I'm all for it!
I was under the impression that 1.4.x fixed a bunch of bugs & was faster
BUT I was wrong (once!) before so go with whatever works best for you.
JavaServer does NOT bind to the loopback interface...
    Mark

On Tue, Jul 20, 2004 at 08:32:13AM +0800, Shao Ming wrote:
> 
> Was looking round for JVM for linux and bump into this benchmarking report.
> http://www.volano.com/report/index.html 
> I was using blackdown 1.4.2. It seem that 1.4.x series seem to have network
> scability performance issues. I believe the JavaServer falls under this
> category, right? Can't recall whether it was actually using loopback. The
> blackdown 1.3.x seem to have better performance.
> /shaoming
> 
> -----Original Message-----
> From: ma...@zz... [mailto:ma...@zz...] 
> Sent: Tuesday, July 20, 2004 8:18 AM
> To: Shao Ming
> Cc: jav...@li...
> Subject: Re: [Javaserver-perl] Re: JavaServer dies when under heavy load
> 
> Even if you don't need the stuff added in 1.4.x there were many bugfixes &
> speed enhancements (& more of that in upcoming 1.5 whatever-the-heck it's
> gonna be called)...
> So unless you REALLY don't want to upgrade using 1.4.x is optimal.
>     Mark
> 
> On Tue, Jul 20, 2004 at 08:13:39AM +0800, Shao Ming wrote:
> >  
> > Hi to all,
> > 
> > Haven't had time to troubleshoot the issue, will be doing in the next 
> > few days.
> > But one quick question came to mind, what are the preferred JVM you 
> > guys are using for your linux box? And if I do not need the Java2 
> > features ... Is 1.3.x series a better choice than 1.4.x?
> > 
> > Cheers!
> > /shaoming
> > 
> > -----Original Message-----
> > From: jav...@li...
> > [mailto:jav...@li...] On Behalf Of 
> > ma...@zz...
> > Sent: Tuesday, July 13, 2004 12:21 PM
> > To: Shao Ming
> > Cc: jav...@li...
> > Subject: [Javaserver-perl] Re: JavaServer dies when under heavy load
> > 
> > Hey Shao,
> >     I would recommend running JavaServer under a profiler or debugger 
> > to see better what's going on.  Does the JVM crash?  Does JavaServer 
> > hang?  Is there a stack trace?
> >     Of course you can create a simple shell watchdog script to restart 
> > JavaServer if it goes away but better to find out the root cause - I 
> > cannot think of a reason why JavaServer would crash under heavy load 
> > from 24 users unless there's a memory leak or you run out of system
> resources somewhere.
> > Of course there could be a JVM bug or any number of things that causes
> this.
> >     & please write to the list 'jav...@li...'
> > so everyone can benefit from this discussion - join @ 
> > http://sourceforge.net/projects/javaserver/
> >     thanks!
> > 	Mark
> > 
> > On Tue, Jul 13, 2004 at 11:14:58AM +0800, Shao Ming wrote:
> > > Hi Mark,
> > >  
> > > first of all, thanks again for the fine piece of work.
> > >  
> > > During our Performance testing, we discover that JavaServer will die 
> > > under heavy load (when we simulate abt 24 virtual users).
> > >  
> > > Do you know of any particluar reason why JavaServer cannot handle 
> > > the
> > load?
> > > Or alternatively, do you know of any 3rd party app that can monitor 
> > > running instance of JavaServer and restart the daemon when its down?
> > >  
> > > this is just the last hurdle I need to rectify before rolling out 
> > > the app for production.
> > >  
> > > thanks for your attention.
> > >  
> > > regards,
> > > /shaoming
> > 
> > 
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