If a shutdown request comes in while we're still starting up, don't

service it until after we execute SetThisStartUpID().  Else shutdown
process will write the wrong SUI into the shutdown checkpoint, which
seems likely to be trouble --- although I've not quite figured out
how significant it really is.

src/backend/postmaster/postmaster.c

@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.306 2003/01/25 05:19:46 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.307 2003/02/23 04:48:19 tgl Exp $
  *
  * NOTES
  *
@@ -1636,7 +1636,26 @@ reaper(SIGNAL_ARGS)
 				ExitPostmaster(1);
 			}
 			StartupPID = 0;
+
+			/*
+			 * Startup succeeded - remember its ID and RedoRecPtr.
+			 *
+			 * NB: this MUST happen before we fork a checkpoint or shutdown
+			 * subprocess, else they will have wrong local ThisStartUpId.
+			 */
+			SetThisStartUpID();
+
 			FatalError = false; /* done with recovery */
+
+			/*
+			 * Arrange for first checkpoint to occur after standard delay.
+			 */
+			CheckPointPID = 0;
+			checkpointed = time(NULL);
+
+			/*
+			 * Go to shutdown mode if a shutdown request was pending.
+			 */
 			if (Shutdown > NoShutdown)
 			{
 				if (ShutdownPID > 0)
@@ -1648,17 +1667,6 @@ reaper(SIGNAL_ARGS)
 				ShutdownPID = ShutdownDataBase();
 			}
 
-			/*
-			 * Startup succeeded - remember its ID and RedoRecPtr
-			 */
-			SetThisStartUpID();
-
-			/*
-			 * Arrange for first checkpoint to occur after standard delay.
-			 */
-			CheckPointPID = 0;
-			checkpointed = time(NULL);
-
 			goto reaper_done;
 		}