Re: WAL archiving disaster

Mike Atkin <mike(dot)atkin(at)gmail(dot)com> writes:
> So... normally this would be curtains for the database but the missing
> segment is from a 4 hour period of practically zero activity. It was
> only archived because it hit the archive_timeout. Is there any way I
> can force postgres to ignore this segment and attempt to redo the rest
> of the logs. I realise this may leave the database terminally
> inconsistent but my focus is on retrieving as much of the data as
> possible for re-entry rather than getting a functional system out the
> other end.

If you're willing to assume there were no updates in that interval,
you could try generating a dummy WAL segment having the correct page
headers and no contents except an XLOG_SWITCH record. I don't know
of any handy tools for that unfortunately.

regards, tom lane