Re: after using pg_resetxlog, db lost

Tom Lane wrote:
> "Shea,Dan [CIS]" <Dan(dot)Shea(at)ec(dot)gc(dot)ca> writes:
>
>>The pg_resetxlog was run as root. It caused ownership problems of
>>pg_control and xlog files.
>>Now we have no access to the data now through psql. The data is still
>>there under /var/lib/pgsql/data/base/17347 (PWFPM_DEV DB name). But
>>there is no reference to 36 of our tables in pg_class. Also the 18
>>other tables that are reported in this database have no data in them.
>>Is there anyway to have the database resync or make it aware of the data
>>under /var/lib/pgsql/data/base/17347?
>>How can this problem be resolved?
>
>
> What this sounds like is that you reset the transaction counter along
> with the xlog, so that those tables appear to have been created by
> transactions "in the future". This could be repaired by doing
> pg_resetxlog with a more appropriate initial transaction ID, but
> figuring out what that value should be is not easy :-(

Tom - would there be any value in adding this to a pg_dump? I'm assuming
the numbers attached to tables etc are their OIDs anyway, so it might be
a useful reference in cases like this.

--
Richard Huxton
Archonet Ltd