Maybe there should be an error message like :
"PostgreSQL has detected severe xlog corruption. Please fix this with
pg_recover (or similar) manually before restarting the database"?
Guess I'm suggesting a separate xlog recovery tool for "bad cases" of
xlog corruption, so decisions can by manually made by a DBA where
necessary. Not everything has to be automatic I'm thinking. There are
probably times where the dBA would prefer behaviour that doesn't seem
intuitive anyway.
Regards and best wishes,
Justin Clift
Tom Lane wrote:
>
> "Mikheev, Vadim" <vmikheev@SECTORBASE.COM> writes:
> >> What I was thinking about in that last paragraph was manual
> >> analysis and recovery. I don't think it's a good idea for automatic
> >> system startup to skip over gaps in the log.
>
> > But if we'll not try to read after gap then after restart system will
> > not notice gap and valid records after it and just rewrite log space
> > with new records. Not much chance for manual analysis - ppl will
> > not report any problems.
>
> That'll be true in any case, unless we refuse to start up at all upon
> detecting xlog corruption (which doesn't seem like the way to fly).
> Not sure what we can do about that.
>
> regards, tom lane
>
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