On Tue, Apr 8, 2014 at 3:16 AM, Heikki Linnakangas <hlinnakan...@vmware.com> wrote: > > I've been playing with a little hack that records a before and after image > of every page modification that is WAL-logged, and writes the images to a > file along with the LSN of the corresponding WAL record. I set up a > master-standby replication with that hack in place in both servers, and ran > the regression suite. Then I compared the after images after every WAL > record, as written on master, and as replayed by the standby. Assuming that adding some dedicated hooks in the core able to do actions before and after a page modification occur is not *that* costly (well I imagine that it is not acceptable in terms of performance), could it be possible to get that in the shape of a extension that could be used to test WAL record consistency? This may be an idea to think about... -- Michael
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