On Fri, Jun 14, 2013 at 2:21 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> So it's not that we actually need to log the individual hint bit
> changes, it's that we need to WAL-log a full page image on the first
> update after a checkpoint, so as to recover from torn-page cases.
> Which one are we doing?
Wal logging a full page image after a checkpoint wouldn't actually be
enough since subsequent hint bits will dirty the page and not wal log
anything creating a new torn page risk. FPI are only useful if all the
subsequent updates are wal logged.
--
greg
