Experimental Physics and
Industrial Control System

Hi Mark,

On 06/26/2018 08:51 AM, Mark Rivers wrote:
> This is what I see after I process the EmptyFreeList record.  Note that
> VSZ has only decreased by about 0.2GB, not by 3GB which I would have
> expected.  Can anyone explain?
> 
> corvette:dxpSITORO/iocBoot/iocFalconX1>ps -p 115038 -o trs,vsz,drs
> 
> TRS    VSZ   DRS
> 
> 15838 7974816 7958977

On linux (using glibc) the C runtime library won't return memory back to
the OS by default, but you can ask it to do so. The first answer to this
StackOverflow question gives some explanation and pointers:

https://stackoverflow.com/questions/2215259/will-malloc-implementations-return-free-ed-memory-back-to-the-system

HTH,

- Andrew

-- 
Arguing for surveillance because you have nothing to hide is no
different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon

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