Tom Lane 48188e1621 Fix recently-understood problems with handling of XID freezing, particularly ... in PITR scenarios. We now WAL-log the replacement of old XIDs with FrozenTransactionId, so that such replacement is guaranteed to propagate to PITR slave databases. Also, rather than relying on hint-bit updates to be preserved, pg_clog is not truncated until all instances of an XID are known to have been replaced by FrozenTransactionId. Add new GUC variables and pg_autovacuum columns to allow management of the freezing policy, so that users can trade off the size of pg_clog against the amount of freezing work done. Revise the already-existing code that forces autovacuum of tables approaching the wraparound point to make it more bulletproof; also, revise the autovacuum logic so that anti-wraparound vacuuming is done per-table rather than per-database. initdb forced because of changes in pg_class, pg_database, and pg_autovacuum catalogs. Heikki Linnakangas, Simon Riggs, and Tom Lane.		2006-11-05 22:42:10 +00:00
..
auth.h	Update copyright for 2006. Update scripts.	2006-03-05 15:59:11 +00:00
be-fsstubs.h	Specify lo_write() to take a _const_ buffer, to match documentation.	2006-09-07 15:37:25 +00:00
crypt.h	Split definitions for md5.c out of crypt.h and into their own header	2006-06-20 19:56:52 +00:00
hba.h	Fix recently-understood problems with handling of XID freezing, particularly	2006-11-05 22:42:10 +00:00
ip.h	Split definitions for md5.c out of crypt.h and into their own header	2006-06-20 19:56:52 +00:00
libpq-be.h	pgindent run for 8.2.	2006-10-04 00:30:14 +00:00
libpq-fs.h	Update copyright for 2006. Update scripts.	2006-03-05 15:59:11 +00:00
libpq.h	Allow include files to compile own their own.	2006-07-13 16:49:20 +00:00
md5.h	Split definitions for md5.c out of crypt.h and into their own header	2006-06-20 19:56:52 +00:00
pqcomm.h	Prepare code to be built by MSVC:	2006-06-07 22:24:46 +00:00
pqformat.h	Update copyright for 2006. Update scripts.	2006-03-05 15:59:11 +00:00
pqsignal.h	Update copyright for 2006. Update scripts.	2006-03-05 15:59:11 +00:00