On Fri, 18 Oct 2013 14:56:59 +0200 Jerome Marchand <jmarchan@xxxxxxxxxx> 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? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>