Re: checkpointer continuous flushing - V16

From: Andres Freund <andres(at)anarazel(dot)de>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: checkpointer continuous flushing - V16
Date: 2016-02-11 18:44:25
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On 2016-02-04 16:54:58 +0100, Andres Freund wrote:
> Fabien asked me to post a new version of the checkpoint flushing patch
> series. While this isn't entirely ready for commit, I think we're
> getting closer.
> I don't want to post a full series right now, but my working state is
> available on
> git:// checkpoint-flush

The first two commits of the series are pretty close to being ready. I'd
welcome review of those, and I plan to commit them independently of the
rest as they're beneficial independently. The most important bits are
the comments and docs of 0002 - they weren't particularly good
beforehand, so I had to rewrite a fair bit.

0001: Make SetHintBit() a bit more aggressive, afaics that fixes all the
potential regressions of 0002
0002: Fix the overaggressive flushing by the wal writer, by only
flushing every wal_writer_delay ms or wal_writer_flush_after


Andres Freund

Attachment Content-Type Size
0001-Allow-SetHintBits-to-succeed-if-the-buffer-s-LSN-is-.patch text/x-patch 3.2 KB
0002-Allow-the-WAL-writer-to-flush-WAL-at-a-reduced-rate.patch text/x-patch 15.7 KB

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