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Re: Java VM specifics on MacOSX

Yes, and when I tested my software using -server didn't make one jot of
difference compared to -client. I think (given that Apple document it as
such) we can safely assume that there is no server VM!

Andy.
----- Original Message -----
From: "David Body" <email@hidden>
To: "Java-Dev" <email@hidden>
Sent: Saturday, April 24, 2004 5:31 PM
Subject: Re: Java VM specifics on MacOSX


> This is consistent with what I've observed. Execute the following:
>
> System.out.println(System.getProperties().getProperty("java.vm.name"));
>
> On OS X, this prints "Java HotSpot(TM) Client VM" with or without the
> -server option.
>
> --David
>
> On Apr 24, 2004, at 11:00 AM, John W. Whitworth wrote:
>
> > Here's what the Apple Java 1.4 documentation says
> >
> > -server
> > There is not a distinct server VM for Mac OS X. Although you may use
> > the -server flag when invoking java, it does not start up a different
> > VM, instead it starts the client VM that has been tuned for use in a
> > server environment. This tuning includes:
> >  Using a different class list for the shared archive generation that
> > does not include the GUI classes.
> >  Increasing the size of the Java heap.
> >  Increasing the size of the Eden generation.
> >  Turns on thread local Eden garbage collection.
> >
> > This list lacks the major aggressive optimisations that are most
> > relevant to the server VM
> >
> > John
> >
> >
> > On 24 Apr 2004, at 16:37, James Bucanek wrote:
> >>
> >> Apple's JVM does take the '-server' option. When I last talked to an
> >> Apple Java engineer (admittedly this was at the 2002 WWDC), they told
> >> me that the -server switch does, indeed, turn on more aggressive
> >> in-lining, garbage collection, and other personality changes.
> >>
> >> What is lacking in Apple's -server implementation are some of the
> >> crazier options offered by other server VMs, like turning off index
> >> range checking or null reference checking.
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References: 
 >Re: Java VM specifics on MacOSX (From: James Bucanek <email@hidden>)
 >Re: Java VM specifics on MacOSX (From: "John W. Whitworth" <email@hidden>)
 >Re: Java VM specifics on MacOSX (From: David Body <email@hidden>)



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