help increase process/kernel memory please

Per olof Ljungmark peo at
Tue Oct 31 17:43:16 UTC 2006

Bill Moran wrote:
>> I'm running a Perl app that need lots of memory and I would like to make 
>> around 2G available to it, the box has 4G physical RAM.
>> Which knob(s) should be tweaked? System is running 6-STABLE from around 
>> 1st of October.
>> This is what I see when the process exits:
>> Out of memory during "large" request for 528384 bytes, total sbrk() is 
>> 536416256 bytes
>> I'm depending on a solution to this and would be a really happy person 
>> if someone could please guide me.
> What does 'ulimit -a' as the user running the process say?
> If the problem is apparent there, the associated docs should help.
Hmmm, ulimit is a sh command, I was using tcsh. The below is after the 
advise from Tom Judge to set "kern.maxdsiz="1610612736". I will try from 
here, thanks.

$ ulimit -a
cpu time               (seconds, -t)  unlimited
file size           (512-blocks, -f)  unlimited
data seg size           (kbytes, -d)  1572864
stack size              (kbytes, -s)  65536
core file size      (512-blocks, -c)  unlimited
max memory size         (kbytes, -m)  unlimited
locked memory           (kbytes, -l)  unlimited
max user processes              (-u)  5547
open files                      (-n)  11095
virtual mem size        (kbytes, -v)  unlimited
sbsize                   (bytes, -b)  unlimited

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