6 Commits

Author	SHA1	Message	Date
Bruce Momjian	9098ab9e32	Update copyrights in source tree to 2008.	2008-01-01 19:46:01 +00:00
Bruce Momjian	f6e8730d11	Re-run pgindent with updated list of typedefs. (Updated README should ... avoid this problem in the future.)	2007-11-15 22:25:18 +00:00
Bruce Momjian	fdf5a5efb7	pgindent run for 8.3.	2007-11-15 21:14:46 +00:00
Tom Lane	9226ba817b	Keep heap_page_prune from marking the buffer dirty when it didn't ... really change anything. Per report from Itagaki Takahiro. Fix by Pavan Deolasee.	2007-10-24 13:05:57 +00:00
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
Tom Lane	282d2a03dd	HOT updates. When we update a tuple without changing any of its indexed ... columns, and the new version can be stored on the same heap page, we no longer generate extra index entries for the new version. Instead, index searches follow the HOT-chain links to ensure they find the correct tuple version. In addition, this patch introduces the ability to "prune" dead tuples on a per-page basis, without having to do a complete VACUUM pass to recover space. VACUUM is still needed to clean up dead index entries, however. Pavan Deolasee, with help from a bunch of other people.	2007-09-20 17:56:33 +00:00