postgres

Author	SHA1	Message	Date
Heikki Linnakangas	15c121b3ed	Rewrite the FSM. Instead of relying on a fixed-size shared memory segment, the free space information is stored in a dedicated FSM relation fork, with each relation (except for hash indexes; they don't use FSM). This eliminates the max_fsm_relations and max_fsm_pages GUC options; remove any trace of them from the backend, initdb, and documentation. Rewrite contrib/pg_freespacemap to match the new FSM implementation. Also introduce a new variant of the get_raw_page(regclass, int4, int4) function in contrib/pageinspect that let's you to return pages from any relation fork, and a new fsm_page_contents() function to inspect the new FSM pages.	18 years ago
Bruce Momjian	33e2e02493	Add CVS version labels to all install/uninstall scripts.	18 years ago
Tom Lane	cc59049daf	Improve handling of prune/no-prune decisions by storing a page's oldest unpruned XMAX in its header. At the cost of 4 bytes per page, this keeps us from performing heap_page_prune when there's no chance of pruning anything. Seems to be necessary per Heikki's preliminary performance testing.	19 years ago
Tom Lane	08fc73c4c3	Code review for btreefuncs additions: restrict to superusers to avoid exposing user data to others, and clean up usage of deprecated APIs.	19 years ago
Bruce Momjian	64058429c5	Add database page inspection /contrib module. Simon and Heikki	19 years ago