Zeugswetter Andreas SB SD wrote:
> > > Yes. But I think you might have to avoid "vacuum full" during data file backup.
> >
> > Why? If vacuum is unsafe in this scenario, wouldn't it also be unsafe
> > in event of a system crash?
>
> I was not sure we are 100% crash safe during "vacuum full".
> But yes, now recalling your last remark on a crash during vacuum full
> I guess we should be.
>
> > I do believe that vacuum should (but presently does not) emit a WAL
> > record showing its truncation of the file, so that the equivalent
> > truncation can be repeated during replay.
>
> > However, this is needed in any case.
>
> I see, but it has only the effect of not freeing the space to the OS,
> so it is not really a bug ? Next vacuum will do it anyway.
One idea is that replication can give is point-in-time recovery. A
recovery is nothing more than a replication slave taking the last full
backup and reading the replication traffic to get itself up to date.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026
