Alvaro Herrera 5da9da71c4 Improve snapshot manager by keeping explicit track of snapshots. ... There are two ways to track a snapshot: there's the "registered" list, which is used for arbitrary long-lived snapshots; and there's the "active stack", which is used for the snapshot that is considered "active" at any time. This also allows users of snapshots to stop worrying about snapshot memory allocation and freeing, and about using PG_TRY blocks around ActiveSnapshot assignment. This is all done automatically now. As a consequence, this allows us to reset MyProc->xmin when there are no more snapshots registered in the current backend, reducing the impact that long-running transactions have on VACUUM.		2008-05-12 20:02:02 +00:00
..
buffer	Put back bufmgr.h in bufpage.h -- it is needed by some macros.	2008-05-12 16:06:10 +00:00
file	Remove the recently added USE_SEGMENTED_FILES option, and indeed remove all	2008-05-02 01:08:27 +00:00
freespace	Reduce memory consumption during VACUUM of large relations, by using	2008-03-10 02:04:10 +00:00
ipc	Improve snapshot manager by keeping explicit track of snapshots.	2008-05-12 20:02:02 +00:00
large_object	Improve snapshot manager by keeping explicit track of snapshots.	2008-05-12 20:02:02 +00:00
lmgr	Adjust the recent patch for reporting of deadlocked queries so that we report	2008-03-24 18:22:36 +00:00
page	Refactor backend makefiles to remove lots of duplicate code	2008-02-19 10:30:09 +00:00
smgr	Remove the recently added USE_SEGMENTED_FILES option, and indeed remove all	2008-05-02 01:08:27 +00:00
Makefile	Refactor backend makefiles to remove lots of duplicate code	2008-02-19 10:30:09 +00:00