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Date: Thu, 22 May 2008 23:00:37 +1000
From: Adrian Thearle <adrian@thearle.com.au>
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Subject: Maximum memory allocation per process
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Hi Guys

I have a problem with a perl script running out of memory. From my 
googling I have found that perl itself does not seem to impose any 
memory limits, and I have check ulimit and login.conf for any userclass 
limitations but found nothing that seems to be limiting my memory.

I have 128MBytes of RAM and a 2Gbyte swap partition.

I am currently running
FreeBSD albert 6.2-STABLE FreeBSD 6.2-STABLE #11: Sun Sep  2 00:45:05 
EST 2007
which I guess isn't exactly the latest... but the same thing happens on 
my REL7.0 Box

The process (imapsync in this case) runs out of ram at pretty much 
512MB. I read on a forum that BSD 6 imposes such a limit of 512MB per 
process, but i have found no where to tune this, or even see what it is.

I have also read that there are two sysctl namely, kern.maxdsiz and 
kern.maxssiz, that can tune memory allocation but what happend to them 
in Freebsd 6.

Your help is appreciated
Adrian