Re: in defensive of zone_reclaim_mode on linux

From: Ben Chobot <bench(at)silentmedia(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: in defensive of zone_reclaim_mode on linux
Date: 2015-09-06 16:05:42
Message-ID: E9A57DF6-DF7A-4B3C-B791-4D828D153562@silentmedia.com
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> On Sep 6, 2015, at 4:07 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> To me that sounds like the negative impact of transparent hugepages
> being mitigated to some degree by zone reclaim mode (which'll avoid some
> cross-node transfers).

FWIW:

$ cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]

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