From: Johannes Weiner <hannes@cmpxchg.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
"Artem S. Tashkinov" <aros@gmx.com>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>
Subject: Re: Let's talk about the elephant in the room - the Linux kernel's inability to gracefully handle low memory pressure
Date: Wed, 7 Aug 2019 17:12:45 -0400 [thread overview]
Message-ID: <20190807211245.GA11071@cmpxchg.org> (raw)
In-Reply-To: <20190807205138.GA24222@cmpxchg.org>
On Wed, Aug 07, 2019 at 04:51:42PM -0400, Johannes Weiner wrote:
> Per default, the OOM killer will engage after 15 seconds of at least
> 80% memory pressure. These values are tunable via sysctls
> vm.thrashing_oom_period and vm.thrashing_oom_level.
Let's go with this:
Per default, the OOM killer will engage after 15 seconds of at least
80% memory pressure. From experience, at 80% the user is experiencing
multi-second reaction times. 15 seconds is chosen to be long enough to
not OOM kill a short-lived spike that might resolve itself, yet short
enough for users to not press the reset button just yet.
next prev parent reply other threads:[~2019-08-07 21:12 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <d9802b6a-949b-b327-c4a6-3dbca485ec20@gmx.com>
2019-08-05 12:13 ` Let's talk about the elephant in the room - the Linux kernel's inability to gracefully handle low memory pressure Vlastimil Babka
2019-08-05 13:31 ` Michal Hocko
2019-08-05 16:47 ` Suren Baghdasaryan
2019-08-05 18:55 ` Johannes Weiner
2019-08-06 9:29 ` Michal Hocko
2019-08-05 19:31 ` Johannes Weiner
2019-08-06 1:08 ` Suren Baghdasaryan
2019-08-06 9:36 ` Vlastimil Babka
2019-08-06 14:27 ` Johannes Weiner
2019-08-06 14:36 ` Michal Hocko
2019-08-06 16:27 ` Suren Baghdasaryan
2019-08-06 22:01 ` Johannes Weiner
2019-08-07 7:59 ` Michal Hocko
2019-08-07 20:51 ` Johannes Weiner
2019-08-07 21:01 ` Andrew Morton
2019-08-07 21:34 ` Johannes Weiner
2019-08-07 21:12 ` Johannes Weiner [this message]
2019-08-08 11:48 ` Michal Hocko
2019-08-08 15:10 ` ndrw.xf
2019-08-08 16:32 ` Michal Hocko
2019-08-08 17:57 ` ndrw.xf
2019-08-08 18:59 ` Michal Hocko
2019-08-08 21:59 ` ndrw
2019-08-09 8:57 ` Michal Hocko
2019-08-09 10:09 ` ndrw
2019-08-09 10:50 ` Michal Hocko
2019-08-09 14:18 ` Pintu Agarwal
2019-08-10 12:34 ` ndrw
2019-08-12 8:24 ` Michal Hocko
2019-08-10 21:07 ` ndrw
2021-07-24 17:32 ` Alexey Avramov
2021-07-25 2:11 ` Hillf Danton
2019-08-08 14:47 ` Vlastimil Babka
2019-08-08 17:27 ` Johannes Weiner
2019-08-09 14:56 ` Vlastimil Babka
2019-08-09 17:31 ` Johannes Weiner
2019-08-13 13:47 ` Vlastimil Babka
2019-08-06 21:43 ` James Courtier-Dutton
2019-08-06 19:00 ` Florian Weimer
2019-08-05 9:05 Hillf Danton
2019-08-05 12:01 ` Artem S. Tashkinov
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