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.		2007-09-21 21:25:42 +00:00
..
buffer	HOT updates. When we update a tuple without changing any of its indexed	2007-09-20 17:56:33 +00:00
file	Remove FileUnlink(), which wasn't being used anywhere and interacted poorly	2007-07-26 15:15:18 +00:00
freespace	Remove remains of old depend target.	2007-01-20 17:16:17 +00:00
ipc	Make some simple performance improvements in TransactionIdIsInProgress().	2007-09-21 17:36:53 +00:00
large_object	Add some simple defenses against null fields in pg_largeobject, and add	2007-06-12 19:46:24 +00:00
lmgr	Replace the former method of determining snapshot xmax --- to wit, calling	2007-09-08 20:31:15 +00:00
page	Improve handling of prune/no-prune decisions by storing a page's oldest	2007-09-21 21:25:42 +00:00
smgr	Implement lazy XID allocation: transactions that do not modify any database	2007-09-05 18:10:48 +00:00
Makefile	Replace useless uses of := by = in makefiles.	2007-02-09 15:56:00 +00:00