tomcat41 producing 28 java daemons

[Joe Shevland]

Ah OK; yep I'd better show my ignorance up front... but anyway, quite keen
to check it out given the large gap ahead of me.

> -----Original Message-----
> From: Peter Schuller [mailto:peter.schuller at infidyne.com]
> Sent: Saturday, 20 March 2004 12:08 AM
> To: freebsd-java at freebsd.org
> Cc: Joe Shevland; Yuri Khotyaintsev; C. Kukulies
> Subject: Re: tomcat41 producing 28 java daemons
>
>
> > Really, every Java spawned thread is a separate process with
> the Linux JDK?
> > (Or is that just how it appears?). Sorry, I shouldn't come out
> of my lurker
> > mode, but that must be expensive?
>
> They do show up as separate processes and they are since kernel
> threads are
> non-existence on Linux. However they do share the same memory so
> you aren't
> wasting gigs and gigs of memory if that's what you're worried about.
>
> And if you were thinking it must be expensive to launch a JVM for
> each thread
> - that's not what's going on either. I dunno *exactly* how it
> works but the
> JVM is forking/cloning for each thread. Unless you use green
> threads, but I
> don't think hardly anyone is doing that nowadays - but it was
> popular back
> when native threads weren't stable (particularly on platforms not
> supported
> by Sun).
>
> --
> / Peter Schuller, InfiDyne Technologies HB
>
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>