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Re: After ~Crash Sequence not correct

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: "Mikheev, Vadim" <vmikheev(at)SECTORBASE(dot)COM>
Cc: "'Tom Lane'" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Henshall, Stuart - WCP" <SHenshall(at)westcountrypublications(dot)co(dot)uk>, pgsql-bugs(at)postgresql(dot)org
Subject: Re: After ~Crash Sequence not correct
Date: 2002-01-03 05:57:13
Message-ID: 200201030557.g035vDA14407@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
Mikheev, Vadim wrote:
> > I have verified that killing the postmaster after a few nextval's
> > leaves things in a bad state after restart.
> > 
> > I think I see the problem: in nextval(), the sequence data written to
> > the WAL log is different from that written to the data page.  Isn't
> > that bogus?
> 
> It was made to avoid WAL-loging on each nextval call, ie it should work
> like OID pre-fetching: value stored in WAL must always "exceed" values
> returned by nextval so on the after-crash-restart sequence should be
> advanced to value which was never returned by nextval (for non-cycled
> sequences). Maybe I made some mistakes in implementation?

Was this ever fixed?

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
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