Re: [Ltsp-discuss] Fw: How to keep X from consuming all available client RAM

[Jim K. <ji...@wi...>]

On Tue, 25 Sep 2007 18:18:57 -0400, Francis Giraldeau wrote
> Hi Jim,
> 
> I did test the code provided to limit the memory of X, but I'm not able
> to reproduce the behavior, in which Firefox dies instead of X, in the
> event where Firefox blow up the memory.
> 
> I did force the terminal to boot with mem=32M. The ratio used is 90%
> (XRAMPERC), so ulimit is launched as follow :
> 
> ulimit -m 1166
> 
> I suppose that it means the current process and all children will not be
> able to use more than 1166 kb of resident size each. If it was the case,
> then de X server wouldn't even start, because the idle X process uses
> 4712 kb.
> 
> In this situation, Firefox still causes the out of memory killer to be
> called.
> 
> Any idea?

Hello Francis.  I ran this under Edubuntu Feisty and with XRAMPERC set to 80% it is
working.  I don't exactly understand how this works, Scott Balnaeves is the one who
ported the old XRAMPERC option from LTSP 4 to LTSP 5 for Edubuntu.  If you contact him
I'm sure he'll be able to help you out.  I assume you followed the directions I posted a
few weeks back, so I don't know what could be causing your problems.  Scott would
probably be able to figure it out fairly quick.  

I have noticed that if I set the XRAMPERC to higher percentages, it doesn't always work.
 This may be due to other apps using a larger amount of RAM already and simply not
having 90% left to use.  Maybe just try a lower percentage quick such as 50% and see if
firefox will die, then work up to a larger number.

Jim

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