Re: limiting hint bit I/O

On Sat, Feb 5, 2011 at 4:31 PM, Bruce Momjian <bruce@momjian.us> wrote:
> 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?

5% of buffers that are hint-bit-dirty but not otherwise dirty.  ISTM
that's exactly what the comment you just quoted says on its face, but
I'm open to some other wording you want to propose.

--
Robert Haas
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