> -----Original Message-----
> From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
>
> "Hiroshi Inoue" <Inoue@tpf.co.jp> writes:
> >>>> I vacuumed here and it worked. I did not use my "old" pg_log
> file - what
> >>>> did I lose?
> >>
> >> Hard to tell. Any tuples that weren't already marked on disk as "known
> >> committed" have probably gone missing, because their originating
> >> transaction IDs likely won't be shown as committed in the new pg_log.
> >> So I'd look for missing tuples from recent transactions in the old DB.
> >>
>
> > Hmm,this may be more serious.
> > MVCC doesn't see committed(marked HEAP_XMIN_COMMITTED) but
> > not yet committed(t_xmin > CurrentTransactionId) tuples.
> > He will see them in the future.
>
> But he did a vacuum --- won't that get rid of any tuples that aren't
> currently considered committed?
>
Oops,did he move old pg_varibale ?
If so my anxiety has no meaning.
Regards.
Hiroshi Inoue
