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Re: Memory released after running rsync

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El 29/11/15 a las 21:12, William Unruh escribió:
> On 2015-11-29, gamo <gamo@telecable.es> wrote:
>>
>> Hello,
>>
>> I have a desktop machine with 32 GB RAM, and as expected most of
>> the memory is used as a cache. Sometimes I have few memory free,
>> less than 1 GB, and happens that after running 'rsync' the memory
>> reported by 'free' as free is increased notably. So the question
>> is: what kind of magic do the rsync program?
>
> memory which is unused is used by Linux as program chache. Instead of
> releasing the program memory, the program is kept in memory in case it
> is reused. HOwever, if some other program requires the memory, it is
> released. Thus probably rsync uses that memory, and then releases it
> before shutting down. Thus the memory is now free. It is no longer used
> for program cache because that use was supreceeded by rsync, and no
> longer used by rsync either.
>
> The above is just a guess.
>>
>> Thanks. Regards.
>>

I realized a test. One script to fill in the memory and get killed by 
the kernel or perl.

First it takes a while. Then, the computer seems hanged. I pressed ^C 
and after a moment, the program exit and I have only 5 GB of memory 
occupied.

So, I is a bit scary, but a 'releasemem' utility is factible.

-- 
http://gamo.eu.pn/
The generation of random numbers is too important to be left to chance
Actually, 360 degree hater.

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Memory released after running rsync gamo <gamo@telecable.es> - 2015-11-29 14:51 +0100
  Re: Memory released after running rsync William Unruh <unruh@invalid.ca> - 2015-11-29 20:12 +0000
    Re: Memory released after running rsync gamo <gamo@telecable.es> - 2015-11-29 21:56 +0100
      Re: Memory released after running rsync William Unruh <unruh@invalid.ca> - 2015-11-29 21:16 +0000
        Re: Memory released after running rsync gamo <gamo@telecable.es> - 2015-11-29 23:52 +0100
      Re: Memory released after running rsync Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-11-30 00:33 +0100
        Re: Memory released after running rsync gamo <gamo@telecable.es> - 2015-11-30 07:16 +0100
          Re: Memory released after running rsync Teemu Likonen <tlikonen@iki.fi> - 2015-12-01 18:04 +0200
            Re: Memory released after running rsync gamo <gamo@telecable.es> - 2015-12-01 23:49 +0100
  Re: Memory released after running rsync Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2015-11-29 18:36 -0800

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