From 48188e1621bb6711e7d092bee48523b18cd80177 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Sun, 5 Nov 2006 22:42:10 +0000
Subject: 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 to have been replaced by FrozenTransactionId.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.

---
 src/include/access/rmgr.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/include/access/rmgr.h')

diff --git a/src/include/access/rmgr.h b/src/include/access/rmgr.h
index 471b0cfb764..7be2dfc9f65 100644
--- a/src/include/access/rmgr.h
+++ b/src/include/access/rmgr.h
@@ -3,7 +3,7 @@
  *
  * Resource managers definition
  *
- * $PostgreSQL: pgsql/src/include/access/rmgr.h,v 1.16 2006/05/02 11:28:55 teodor Exp $
+ * $PostgreSQL: pgsql/src/include/access/rmgr.h,v 1.17 2006/11/05 22:42:10 tgl Exp $
  */
 #ifndef RMGR_H
 #define RMGR_H
@@ -12,6 +12,9 @@ typedef uint8 RmgrId;
 
 /*
  * Built-in resource managers
+ *
+ * Note: RM_MAX_ID could be as much as 255 without breaking the XLOG file
+ * format, but we keep it small to minimize the size of RmgrTable[].
  */
 #define RM_XLOG_ID				0
 #define RM_XACT_ID				1
@@ -20,6 +23,7 @@ typedef uint8 RmgrId;
 #define RM_DBASE_ID				4
 #define RM_TBLSPC_ID			5
 #define RM_MULTIXACT_ID			6
+#define RM_HEAP2_ID				9
 #define RM_HEAP_ID				10
 #define RM_BTREE_ID				11
 #define RM_HASH_ID				12
-- 
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