Re: Bug #807: Sequence currupted on recovery after kill -9

On Tue, 29 Oct 2002 pgsql-bugs(at)postgresql(dot)org wrote:

> Matt Thompson (mthomp(at)tierfleet(dot)com) reports a bug with a severity of 2
> The lower the number the more severe it is.
>
> Short Description
> Sequence currupted on recovery after kill -9
>
> Long Description
> If you create a file with an implied sequence and do a couple of inserts, then do a kill -9, when you start up again, the sequence will have a corrupted next_value field. In the example, the value of last_value is 4 before the kill -9 and 34 when it comes back up.
>

The purpose of a sequence is not to insure that the numbers are
consecutive, only to insure that they are unique. If you have failed
inserts, you will see holes also.

I don't know off the top of my head how to do consecutive numbers. Maybe
only with a table lock.

- robert