On Thu, Mar 01, 2007 at 04:54:44PM +0200, Hannu Krosing wrote: > > > I was not suggesting that we remove visible rows through truncation. > > > > Sure, unless you suggest to not truncate during this vacuum run ? > > But we are talking about vacuum full, so truncation is essential. > > > > It was suggested to do a dummy null update to move live tuples up front. > > The old version is still visible for serializable txns. > > There should probably be a wait-other-trxs to finish stage between > COMPACT and 2nd VACUUM if truncation at this cycle is absolutely needed
Or you could just do a vacuum a bit later. If we've also got the DSM at that point, vacuum should be fast. -- Jim Nasby [EMAIL PROTECTED] EnterpriseDB http://enterprisedb.com 512.569.9461 (cell) ---------------------------(end of broadcast)--------------------------- TIP 7: You can help support the PostgreSQL project by donating at http://www.postgresql.org/about/donate
