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Blackdown JDK 1.2.2
Jserv 1.1.2
Linux RH6.1
I want to turn on green threads for the java interpreter for
jserv. Before you blast me for doing this, i don't want this for
production, but i want to do this for our test jserv environents, of
which we have several on one machine, and they are chewing up too many
processes.
I have tried the following in jserv.properties:
> wrapper.bin.parameters=-green
and
> wrapper.bin.parameters=-threads=green
but get this in my logs:
> Unrecognized option: -green
> Could not create the Java virtual machine.
and
> Unrecognized option: -threads=green
> Could not create the Java virtual machine.
If you can tell me what I am doing wrong, I would apreciate it.
<aspestos-suit>
BTW, I know Linus T. is a nice brilliant guy, but he is wrong about
the 1 thread = 1 process architecture in Linux. In recent testing
(http://www.javalobby.org/features/jpr/) it was shown that Windows
scaled better in # of Java threads than Linux. These results because
even the nimble Linux threads (read "processes") are still much more
heavy-weight than Windows threads, which are N:1 type I believe.
We all make mistakes. I think he is quite wrong on this one. And we
are paying for his intransigence (on this issue). If anything, this
is one of the most likely areas for Linux kernal forking...
For more info:
1 - http://www-4.ibm.com/software/developer/library/java2/index.html
"Java technology, threads, and scheduling in Linux
Patching the kernel scheduler for better Java performance"
Ray Bryant and Bill Hartner
IBM Linux Technology Center
January 2000
2 - here is the threads FAQ, another very good (read "relatively
unbiased") resource:
http://www.serpentine.com/~bos/threads-faq/
3 - here is the very FUDy linux threads faq
http://pauillac.inria.fr/~xleroy/linuxthreads/faq.html
my $0.02
</aspestos-suit>
thanks,
glen
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