Re: What does "[backends] should seldom or never need to wait for a write to occur" mean?

Hi Bruce,

Thanks, yes I agree that that is much clearer. However when you say:

When the percentage of dirty shared buffers is high, the background writer
> writes some of them to the file system...

I haven't seen anything about a minimum percentage before the bgwriter
kicks in, is that really the case? How is it configured?

Thanks, Chris.

On Wed, 11 Nov 2020 at 23:24, Bruce Momjian <bruce(at)momjian(dot)us> wrote:

> On Wed, Nov 11, 2020 at 11:29:09AM +0000, Chris Wilson wrote:
> > I still believe that my original proposed change, to "This reduces the
> chances
> > that a backend needing an empty buffer must [itself] write a dirty one
> back to
> > disk before evicting it" (with one extra word added), resolves the
> ambiguity
> > and also more clearly and directly focuses it on what the bgwriter does
> and
> > why, making it better documentation. It might be incorrect if my
> understanding
> > is incorrect - is it?
>
> You make some very good points. Here is an updated patch.
>
> --
> Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
> EnterpriseDB https://enterprisedb.com
>
> The usefulness of a cup is in its emptiness, Bruce Lee
>
>