Alvaro Herrera wrote:
I didn't know we were doing HOT pruning during vacuum; does it make sense?
Removing HOT-updated, dead tuples is a bit complicated. It needs to be done one HOT-chain at a time, and the root line pointer needs to be updated to the next live tuple in the chain. lazy_scan_heap() calls the regular pruning function heap_page_prune() to deal with those before doing the normal scan of line pointers.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
