Mailinglist Archive: opensuse (1239 mails)

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Re: [opensuse] Re: XFS and openSUSE 12.1
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On 2013-06-12 09:37, Roger Oberholtzer wrote:
On Wed, 2013-06-12 at 08:24 +0200, Per Jessen wrote:

It only grows as long as nothing else needs the memory. Using up
otherwise unused memory as file systems cache seems quite
prudent.

Would that this were the case. The memory use increases until
process start to be killed. Which is the standard way Linux deals
with memory shortages.


No, never. I have never seen that.

What I have seen is, that if a process requests more for itself, and
there is not enough memory, it is taken from the system cache, which
reduces size till almost nil. Then, as the process demands more
memory, some processes get killed because there is no free and no
cache memory to take from. Not the other way round.




Whether the cache size stops at some reasonable point or not is
perhaps a side issue. The question remains: why, as the cache
grows, do write calls periodically have longer and longer delays
(in the magnitude of seconds)? If the cache is not causing this,
then why does freeing it with the workaround result in these delays
not happening?

This may be related or coincidental.


- --
Cheers / Saludos,

Carlos E. R.
(from 12.3 x86_64 "Dartmouth" at Telcontar)
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