Tom Lane wrote: > I don't much like the idea of adding an xid to the page header --- for > one thing, *which* xid would you put there, and what would you test it > against?
I was thinking that you would put the smallest in-progress xmax on the page there, and you would test it against OldestXmin. If all transactions commit, there surely isn't anything to prune until that xid falls beyond the OldestXmin horizon. If an inserting transaction aborts, we could prune the aborted tuple earlier, but optimizing for aborts doesn't seem that important. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
