Introduce wal_level GUC to explicitly control if information needed for

archival or hot standby should be WAL-logged, instead of deducing that from
other options like archive_mode. This replaces recovery_connections GUC in
the primary, where it now has no effect, but it's still used in the standby
to enable/disable hot standby.

Remove the WAL-logging of "unlogged operations", like creating an index
without WAL-logging and fsyncing it at the end. Instead, we keep a copy of
the wal_mode setting and the settings that affect how much shared memory a
hot standby server needs to track master transactions (max_connections,
max_prepared_xacts, max_locks_per_xact) in pg_control. Whenever the settings
change, at server restart, write a WAL record noting the new settings and
update pg_control. This allows us to notice the change in those settings in
the standby at the right moment, they used to be included in checkpoint
records, but that meant that a changed value was not reflected in the
standby until the first checkpoint after the change.

Bump PG_CONTROL_VERSION and XLOG_PAGE_MAGIC. Whack XLOG_PAGE_MAGIC back to
the sequence it used to follow, before hot standby and subsequent patches
changed it to 0x9003.

1 files changed, 1 insertions, 8 deletions

diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
index 151299555cf..0b6cbcc4af0 100644
--- a/src/backend/executor/execMain.c
+++ b/src/backend/executor/execMain.c
@@ -26,7 +26,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.348 2010/02/26 02:00:41 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/execMain.c,v 1.349 2010/04/28 16:10:42 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2241,14 +2241,7 @@ CloseIntoRel(QueryDesc *queryDesc)
 
 		/* If we skipped using WAL, must heap_sync before commit */
 		if (myState->hi_options & HEAP_INSERT_SKIP_WAL)
-		{
-			char		reason[NAMEDATALEN + 30];
-
-			snprintf(reason, sizeof(reason), "SELECT INTO on \"%s\"",
-					 RelationGetRelationName(myState->rel));
-			XLogReportUnloggedStatement(reason);
 			heap_sync(myState->rel);
-		}
 
 		/* close rel, but keep lock until commit */
 		heap_close(myState->rel, NoLock);