[VPM] deallocating memory of multi-threaded server while IDLE.

abez abez at abez.ca
Wed Feb 11 14:27:04 CST 2004

You really should test the behaviour. The task managers et al. are not
very reliable to actually tell if you're going to run out of memory.
I suggest turning off swap and then seeing how many processes w/ their
threads you can add.

Add processes when it looks like there is no memory left. The OS will
probably come by and reclaim some memory from the other processes.


On Wed, 11 Feb 2004, Eric wrote:

> Peter,
> Is this more connected with the Kernel or with POSIX compliance? I know that the Kernel is responsible for supporting/implementing POSIX, but is it the support of POSIX that causes the problem or is it  
> a not related Kernel issue?  I wonder because I have heard that same phrase in reference to this discussion before about "Unix and its variants" Common thread that I know of in that case is POSIX
> Thanks,
> Eric 
> At 11:51 AM 2/11/2004, Peter Scott wrote:
> >At 11:39 AM 2/11/2004 -0800, Eric wrote:
> >>Hi,
> >>
> >>I don't have time to dig up the exact quote.  But that is not the case. I can't remember if it was in advanced perl or the Camel book that talked about this. It might have been perltoot or another man page too. Wish I could remember.
> >
> >On Unix and variants, a process never decreases its memory footprint.  Once you allocate memory it is unavailable to other processes until the process terminates.
> >
> >>At 11:30 AM 2/11/2004, Darren Duncan wrote:
> >>>At 7:38 AM -0800 2/11/04, Eric Frazier wrote:
> >>>>Hi,
> >>>>Not that it matters that much, but I believe this is a OS level issue,
> >>>>not even Perl.
> >>>>Thanks,
> >>>>Eric
> >>>
> >>>My understanding is that other applications can return memory to the system while they are running, in which case the OS supports it. -- Darren Duncan
> >
> >-- 
> >Peter Scott
> >Pacific Systems Design Technologies
> >http://www.perldebugged.com/
> >*** New! *** http://www.perlmedic.com/

abez ------------------------------------------
http://www.abez.ca/ Abram Hindle (abez at abez.ca)
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