Re: 9.2.1 & index-only scans : abnormal heap fetches after VACUUM FULL

On Tue, Dec  3, 2013 at 02:01:52PM -0500, Robert Haas wrote:
> On Tue, Dec 3, 2013 at 11:25 AM, Bruce Momjian <bruce@momjian.us> wrote:
> > On Thu, Nov 28, 2013 at 05:38:05PM -0500, Bruce Momjian wrote:
> >> > I wonder if we ought to mark each page as all-visible in
> >> > raw_heap_insert() when we first initialize it, and then clear the flag
> >> > when we come across a tuple that isn't all-visible.  We could try to
> >> > set hint bits on the tuple before placing it on the page, too, though
> >> > I'm not sure of the details.
> >>
> >> I went with the per-page approach because I wanted to re-use the vacuum
> >> lazy function.  Is there some other code that does this already?  I am
> >> trying to avoid yet-another set of routines that would need to be
> >> maintained or could be buggy.  This hit bit setting is tricky.
> >>
> >> And thanks much for the review!
> >
> > So, should I put this in the next commit fest?
> 
> +1.

OK, I added it to the January commit fest.

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
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