Re: does dml operations load the blocks to the shared buffers ?

From: Guillaume Lelarge <guillaume(at)lelarge(dot)info>
To: Mariel Cherkassky <mariel(dot)cherkassky(at)gmail(dot)com>
Cc: PostgreSQL mailing lists <pgsql-performance(at)postgresql(dot)org>
Subject: Re: does dml operations load the blocks to the shared buffers ?
Date: 2019-01-10 08:55:04
Message-ID: CAECtzeXdq8YHo7v8oTmUYCz29T8G1kc=1L6hO9i0Y-mbPMjaYw@mail.gmail.com
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Le jeu. 10 janv. 2019 à 09:07, Mariel Cherkassky <
mariel(dot)cherkassky(at)gmail(dot)com> a écrit :

> Hey,
> It is clear that when we query some data, if that data isnt in the shared
> buffers pg will go bring the relevant blocks from the disk to the shared
> buffers. I wanted to ask if the same logic works with
> dml(insert/update/delete). I'm familiar with the writing logic, that the
> checkpointer is the process that writing the data changes into the data
> files during every checkpoint and that the commit write the changes from
> the wal buffers to to the wal files. I wanted to ask about a situation
> where we run dmls and that data isnt available in the shared buffers.
>
>
It works the same.

--
Guillaume.

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