Re: Sum of written buffers bigger than allocation?

From: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>
To: pinker <pinker(at)onet(dot)eu>
Cc: Postgres General <pgsql-general(at)postgresql(dot)org>
Subject: Re: Sum of written buffers bigger than allocation?
Date: 2018-04-08 15:53:31
Message-ID: CAMkU=1wcaFqx-JVNQ=T5wgu7ceCRsNRnTy7PjPOKSivLwnujvg@mail.gmail.com
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On Sun, Apr 8, 2018 at 11:28 AM, pinker <pinker(at)onet(dot)eu> wrote:

>
>
> It's kinda mysterious... Any explanations?
> Does it mean that the same buffers were written over and over again?
>
>
Yeah, checkpoints will write all dirty buffers, but doesn't evict them.
Next time the page is needed, it doesn't need to be re-read as it is still
there.

Cheers,

Jeff

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