Re: Java Dual CPU, Single CPU, Performance

From: David Ashe (ls011g7939_at_blueyonder.co.uk)
Date: 06/10/04 

Date: Thu, 10 Jun 2004 22:59:12 +0100

Ok, i think your problem is that your application server does not support
dual cpu, so going to linux wouldnt solve your problem but its not a bad
idea anyway :-) short of getting it to run on more than one jvm i dont know
what you could do..

apart from give jboss a try.. i'm sure it supports dual cpu

"Tomer Ben-David" <tomerbd@barak-online.net> wrote in message
news:161d1c31.0406100338.61311116@posting.google.com...
> Hi (for both replies :)
> Here are the detials of the machine/appserver that is being used for
> development dual cpu testing
>
> System Information report written at: 06/10/2004 08:57:01 AM
> [System Summary]
>
> Item Value
> OS Name Microsoft Windows 2000 Server
> Version 5.0.2195 Service Pack 4 Build 2195
> OS Manufacturer Microsoft Corporation
> System Manufacturer VIA Technologies, Inc.
> System Model MS-6321
> System Type X86-based PC
> Processor x86 Family 6 Model 8 Stepping 6 GenuineIntel ~800 Mhz
> Processor x86 Family 6 Model 8 Stepping 6 GenuineIntel ~800 Mhz
> BIOS Version Award Modular BIOS v6.00PG
> Windows Directory C:\WINNT
> System Directory C:\WINNT\system32
> Boot Device \Device\Harddisk0\Partition1
> Locale United States
> Total Physical Memory 523,760 KB
> Available Physical Memory 300,696 KB
> Total Virtual Memory 1,802,308 KB
> Available Virtual Memory 1,132,408 KB
> Page File Space 1,278,548 KB
> Page File C:\pagefile.sys
>
> App server : resin2.1.6
>
>
> perry <perry@cplusplus.org> wrote in message
news:<6cJxc.35925$sS2.1215715@news20.bellglobal.com>...
> > sounds to me like you are having an operating system problem,
> > independent of your j2ee app. run some benchmarks on your new machine
> > vs. your old machine. incidentally, r u on a linux platform or are you
> > trying your luck with windows...
> >
> > - perry
> >
> > Tomer Ben-David wrote:
> > > Hi
> > >
> > > I have a big j2ee appliction that was so forth run on a single cpu
> > > machine.
> > >
> > > I have tested it on a dual cpu machine, its running much slower (about
> > > X3 times slower).
> > >
> > > I know that synchronize code fragments (indirect ones as well, such as
> > > the fact that StringBuffer is synchronized) can make code run slower
> > > on dual cpu machines.
> > >
> > > What am I to do?
> > > Scan all my code for direct/indirect usage of synchronized (sounds
> > > horrible)?
> > > How can I make my j2ee app run faster on a dual cpu machine?
> > > What else besides synchronization can make my j2ee app run slower on a
> > > dual cpu machine?

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