[fedora-java] Eclipse and JVM memory settings

[Søren Mathiasen]

Could we do what the eclipseWin.c appears to do. Run the java -version using libjvm.so, check if it returns as string containing Sun Microsystems ??
And if so, try to run with the -XX parameters..

Didn't look to much at the code, but we could also add checks for other JVM's (blackdown, IBM etc..) so we can add startup options if they require something special.


/Soren

On Thu, 13 Sep 2007 16:33:05 -0400
Andrew Overholt <overholt at redhat.com> wrote:

> Hi,
> 
> Now that we have people using Eclipse on IcedTea, we have people
> starting to hit memory limits.  I don't understand the situation very
> well, but here are some links to Eclipse bug reports, etc.:
> 
> http://www.eclipsezone.com/eclipse/forums/t101303.rhtml
> 
> http://wiki.eclipse.org/FAQ_How_do_I_increase_the_permgen_size_available_to_Eclipse%3F
> 
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=195897
>  - the Eclipse launcher (largely written in C) can tell if it's running
>    on a Sun VM on Windows -- it looks like it reads .dll headers -- but
>    not on Linux
> 
> I spoke briefly with Andrew Niefer and a few other people on IRC and
> here are a few options for fixing the launcher to work with the -XX
> options in both the Sun VM and non-Sun VM cases:
> 
>   1. try starting the VM using the invocation api (using libjvm.so) with
>      the PermSize argument and see if it fails - if it does, launch
>      without the option.  This may add some startup delay to VMs that
>      don't support this option.  This was suggested in the eclipse.org
>      bug I link to above.
> 
>   2. look for a jre/LICENSE text file and seeing if it starts with "Sun
>      Microsystems".  Andrew Niefer suggested this option.
> 
> Can anyone think of anything better?  Note that I don't want to add a
> shell wrapper around the binary Eclipse launcher unless we absolutely
> have to.
> 
> The Eclipse launcher code can be seen in CVS here:
> 
> :pserver:anonymous at dev.eclipse.org:/cvsroot/eclipse
> Module:  org.eclipse.equinox.executable
> Branch:  R3_3_maintenance (or HEAD if you like)
> 
> Specifically, library/win32/eclipseWin.c in the isSunVM() function.
> library/eclipseNix.c has an isSunVM() that just returns 0.
> 
> Andrew