On Mon, Aug 9, 2010 at 1:50 PM, Simon Riggs <si...@2ndquadrant.com> wrote: > On Sat, 2010-08-07 at 16:11 -0700, Gordon Shannon wrote: > >> So, I guess my real question here is, what happened to the "missing" >> 100 items? If it was HOT prune, can anyone summarize what that does? > > Itagaki already explained that the second DELETE would have removed the > 100 dead rows you consider to be missing. > > Any SQL statement that reads a block can do HOT pruning, if the block is > otherwise unlocked.
Where does heap_page_prune() get called from in the DELETE path? -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
