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List:       pgsql-performance
Subject:    Re: NUMA settings
From:       Laurenz Albe <laurenz.albe () cybertec ! at>
Date:       2020-05-05 8:25:57
Message-ID: 78e4af96a4b34f1280ef96ddf347d5f7b8a53380.camel () cybertec ! at
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On Tue, 2020-05-05 at 10:11 +0200, Marc Rechté wrote:
> > I think that "vm.swappiness" should be 0.
> > PostgreSQL does its own memory management, any swapping by the kernel
> > would go against that.
> > 
> > Yours,
> > Laurenz Albe
> > 
> As said in the post, we wish the idle backends to be swapped out if 
> necessary. Therefore lowering swappiness would produce the opposite 
> effect: swapping out Linux file cache rather than backends memory.

I see.  Sorry for not paying attention.

An idle backend consumes only a few MB of RAM, though.

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com



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