Question..is the HotSpot 2.0 Server JVM the same thing that comes with the
JDK 1.3.1 in the /bin/server folder? If I install the full JDK 1.3.1, and
not JRE 1.3.1, do I need the HotSpot 2.0?
I know this isn't Orion specific, but since we are on the topic of
performance tuning Orion and using the -server option, I thought I'd ask.
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Adam Cassar
> Sent: Wednesday, July 25, 2001 10:44 PM
> To: Orion-Interest
> Subject: Re: Orion Performance Tuning
>
>
> Enable the undocumented option:
>
> -Xconcurrentio
>
> You will find that with a large number of simultaneous connections
> you will gain a large performance increase. (The sun site claim up to 40%,
> but I have only found a 20-30% depending on the app).
>
> Read
>
> http://java.sun.com/docs/hotspot/VMOptions.html
>
> and
>
> http://java.sun.com/docs/hotspot/PerformanceFAQ.html
>
> and
>
> http://java.sun.com/docs/hotspot/gc/index.html
>
> for a good overview.
>
> On Wed, Jul 25, 2001 at 10:51:27AM -0700, Robert S. Sfeir wrote:
> > Hello all,
> >
> > I've gone through and read most of the information posted from
> this list
> > about improving the performance of Orion, and increasing the number of
> > threads Orion uses to improve its overall performance under load.
> >
> > What I've been able to do so far, and it's helped a lot, is:
> > 1- Added the -Xms and -Xmx switches to make sure Orion starts
> and uses more
> > memory, they're set at 100MB and 300MB respectively, and Orion
> uses 175MB
> > as soon as I start it up, and doesn't seem to grow past 177MB
> as the day
> > goes one and it gets used.
> >
> > 2- I added the -server switch in front of the java command so
> we make sure
> > we use the Server version of the HotSpot VM. (Boy does this
> thing pick up
> > speed when using the -server switch!)
> >
> > Is there anything else that can be done, short of clustering,
> to further
> > increase Orion's performance?
> >
> > My main objective is to make sure we don't get any more weird hangs and
> > long wait times in Orion for no apparent reason. Perhaps
> increasing the
> > number of threads Orion uses? I can't seem to find any
> definite answer on
> > that.
> >
> > Our servlet seems to be fine, but sometimes when clicking
> through a test
> > web site, one url request seemed to just sit there and hang, as
> if Orion
> > was dead, but I could click and request a different URL and get
> immediate
> > response. So I assumed it was threads in Orion which were not being
> > managed properly.
> >
> > After making reading the posts to the list and making the the 2 changes
> > above, the problem seemed to have gone away for the most part,
> except it
> > still happens from time to time in Netscape, IE doesn't seem to
> have this
> > problem. I can quit Netscape and go back in and the problem is
> gone for a
> > while. There is no specific time frame for it to happen. It
> does happen
> > consistently when I click, then stop for about 30-60 seconds,
> then click
> > again or reload, and it just sits there and waits for the world
> to come to
> > an end of something. Very bizarre.
> >
> > Any ideas you may have would be of great help.
> >
> > Thanks
> > R
> >
> >
> > Robert S. Sfeir
> > Director of Software Development
> > PERCEPTICON corporation,
> > in Joint Venture With JTransit
> > San Francisco, CA 94123
> > pw - http://www.percepticon.com/
> > jw - http://jtransit.com
> > e- [EMAIL PROTECTED]
> >
> >
> >
> >
>
> --
>
> Adam Cassar
> Technical Development Manager
> ___________________________________________
> NetRegistry http://www.netregistry.net
> D: +61 2 9641 8609 | F: +61 2 9699 6088
> PO Box 270 Broadway NSW 2007 Australia
>
