Tom Lane wrote: > Bruce Momjian <[EMAIL PROTECTED]> writes: > > Tom Lane wrote: > >> I think that's not happening, conditionally or otherwise. The atomicity > >> problems alone are sufficient reason why not, even before you look at > >> the performance issues. > > > What are the atomicity problems of adding a create/expire xid to the > > index tuples? > > You can't update a tuple's status in just one place ... you have to > update the copies in the indexes too.
But we don't update the tuple status for a commit, we just mark the xid as committed. We do have lazy status bits that prevent later lookups in pg_clog, but we have those in the index already also. What am I missing? -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
