Messages in this thread |  | | Date | Tue, 5 Nov 2013 15:53:19 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v4 2/2] mm: allow to set overcommit ratio more precisely |
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On Fri, 18 Oct 2013 14:56:59 +0200 Jerome Marchand <jmarchan@redhat.com> wrote:
> Some applications that run on HPC clusters are designed around the > availability of RAM and the overcommit ratio is fine tuned to get the > maximum usage of memory without swapping. With growing memory, the 1% > of all RAM grain provided by overcommit_ratio has become too coarse > for these workload (on a 2TB machine it represents no less than > 20GB). > > This patch adds the new overcommit_ratio_ppm sysctl variable that > allow to set overcommit ratio with a part per million precision. > The old overcommit_ratio variable can still be used to set and read > the ratio with a 1% precision. That way, overcommit_ratio interface > isn't broken in any way that I can imagine.
The way we've permanently squished this mistake in the past is to switch to "bytes". See /proc/sys/vm/*bytes.
Would that approach work in this case?
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