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
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