Dave,

I worked with that 3GB switch to try to get up to 2g heap but was never able
to do it successfully - get a large heap I mean. Never tried it was jrocket
though.

-Mark



-----Original Message-----
From: Dave Watts [mailto:dwa...@figleaf.com] 
Sent: Thursday, April 03, 2014 9:08 AM
To: cf-talk
Subject: Re: max heap


> 1.8 is possible on a linux 32bit server... on a windows 32 bit is closer
to
> 1.4 - a lot depends on the overall settings you choose.
>
> As for 64bit the upper limit is purley theoretical and you will likely
never
> reach it - probably more than a petabyte.  In practice we have some 12gig
> heaps running successfully - and more is possible.  It's just that you
tend
> to start running more instances or servers rather than continuing to up
the
> heap size.

Actually, it is possible to exceed that on 32-bit Windows Server 2003
with a switch at system startup.

https://blogs.oracle.com/jrockit/entry/how_to_get_almost_3_gb_heap_on_window
s

That said, I've never bothered to do this, and am not sure it would be
a great idea anyway.

As for "max heap size" in general, I don't think there's anything
CF-specific about it. CF will use whatever is available if it needs to
use it, but heap size is completely controlled by the JVM.

Dave Watts, CTO, Fig Leaf Software
1-202-527-9569
http://www.figleaf.com/
http://training.figleaf.com/

Fig Leaf Software is a Veteran-Owned Small Business (VOSB) on
GSA Schedule, and provides the highest caliber vendor-authorized
instruction at our training centers, online, or onsite.



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