Bruce Momjian wrote: > Tom Lane wrote: >> The we-already-pinned-the-page problem is a bit nasty but may not be >> insurmountable.
If you find a way, that would be great. > As I understand it, there are two HOT features: > > Single-chain pruning, which trims HOT chains but doesn't reuse > the space > > Defragementation, which prunes the entire page and reuses space > and handles deleted rows, etc. I'm repeating myself, but I would split that second operation into two parts while we think about this: pruning the entire page, and defragmenting (PageRepairFragmentation). Tom wondered why they're separated in the patch. As the patch stands, there is no reason, but I feel that separating them and doing them at different times might be an important piece in the puzzle. -- 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
