| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Jim Nasby <jim(at)nasby(dot)net>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: limiting hint bit I/O |
| Date: | 2011-02-05 21:31:47 |
| Message-ID: | 201102052131.p15LVlG24322@momjian.us |
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| Lists: | pgsql-hackers |
Robert Haas wrote:
> On Sat, Feb 5, 2011 at 10:37 AM, C?dric Villemain
> <cedric(dot)villemain(dot)debian(at)gmail(dot)com> wrote:
> > Please update the commitfest with the accurate patch, there is only
> > the old immature v1 of the patch in it.
> > I was about reviewing it...
> >
> > https://commitfest.postgresql.org/action/patch_view?id=500
>
> Woops, sorry about that. Here's an updated version, which I will also
> add to the CommitFest application.
>
> The need for this patch has been somewhat ameliorated by the fsync
> queue compaction patch. I tested with:
Uh, in this C comment:
+ * or not we want to take the time to write it. We allow up to 5% of
+ * otherwise-not-dirty pages to be written due to hint bit changes,
5% of what? 5% of all buffers? 5% of all hint-bit-dirty ones? Can you
clarify this in the patch?
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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