* David Fetter (da...@fetter.org) wrote: > On Mon, Dec 19, 2011 at 09:34:51AM -0500, Robert Haas wrote: > > On Mon, Dec 19, 2011 at 9:14 AM, Stephen Frost <sfr...@snowman.net> wrote: > > > Fair enough, but, could we distinguish these two cases? In other words, > > > would it be possible to detect if a page was torn due to a 'traditional' > > > crash and not complain in that case, but complain if there's a CRC > > > failure and it *doesn't* look like a torn page? > > > > No. > > Would you be so kind as to elucidate this a bit?
I'm guessing, based on some discussion on IRC, that it's because we
don't really 'detect' torn pages today, when it's due to a hint-bit-only
update. With all the trouble due to hint-bit updates, and if they're
written out or not, makes me wish we could just avoid doing hint-bit
only updates to disk somehow.. Or log them when we do them. Both of
those have their own drawbacks, of course.
Thanks,
Stephen
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