Simon Riggs 978b2f65aa Speedup 2PC by skipping two phase state files in normal path ... 2PC state info is written only to WAL at PREPARE, then read back from WAL at COMMIT PREPARED/ABORT PREPARED. Prepared transactions that live past one bufmgr checkpoint cycle will be written to disk in the same form as previously. Crash recovery path is not altered. Measured performance gains of 50-100% for short 2PC transactions by completely avoiding writing files and fsyncing. Other optimizations still available, further patches in related areas expected. Stas Kelvich and heavily edited by Simon Riggs Based upon earlier ideas and patches by Michael Paquier and Heikki Linnakangas, a concrete example of how Postgres-XC has fed back ideas into PostgreSQL. Reviewed by Michael Paquier, Jeff Janes and Andres Freund Performance testing by Jesper Pedersen		2016-01-20 18:40:44 -08:00
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brin	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
common	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
gin	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
gist	Fix assorted inconsistencies in GiST opclass support function declarations.	2016-01-19 12:04:36 -05:00
hash	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
heap	Update copyright for 2016	2016-01-02 13:33:40 -05:00
index	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
nbtree	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
rmgrdesc	Revoke change to rmgr desc of btree vacuum	2016-01-09 18:31:08 +00:00
spgist	Restructure index access method API to hide most of it at the C level.	2016-01-17 19:36:59 -05:00
tablesample	Update copyright for 2016	2016-01-02 13:33:40 -05:00
transam	Speedup 2PC by skipping two phase state files in normal path	2016-01-20 18:40:44 -08:00
Makefile	TABLESAMPLE, SQL Standard and extensible	2015-05-15 14:37:10 -04:00