Originally posted by: Troispoils

Hi,

Does anyone have an explanation about the "rss" or "memory" limits ?

I've just read the "Developing and Porting C and C++ Applications on AIX" redbook but there is no reference to RSS limit.
In my case, SAP asks me to set it to unlimited, but i would like to know why...

Thx for your help.

Regards,

Jacques
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Originally posted by: j.gann

http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf1/getrlimit_64.htm

"rss" ulimit is not enforced by the kernel, so it is a no-op unless your sw actively checks the setting. same goes for the "memory" ulimit but not for "data".
#AIX-Forum

Originally posted by: Troispoils

Thanks for your answer !

So, It's strange for an sw provider to recommand to set this limit to unlimited...It will be better to ignore this setting...

Regards,
#AIX-Forum

Originally posted by: j.gann

that's not strange but common. if you're wise you set the limit as recommended. next time the sw will malfunction for other/unknown reasons you'll be glad you did.

if you're into investigation you can write a small program that malloc()s sufficient memory and check the result with different ulimit settings for memory,rss and data. that's what I did.
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