*** pgsql/src/include/catalog/pg_control.h	2009/08/31 02:23:23	1.44
--- pgsql/src/include/catalog/pg_control.h	2009/12/19 01:32:42	1.45
***************
*** 8,14 ****
   * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
!  * $PostgreSQL: pgsql/src/include/catalog/pg_control.h,v 1.43 2009/01/01 17:23:57 momjian Exp $
   *
   *-------------------------------------------------------------------------
   */
--- 8,14 ----
   * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
!  * $PostgreSQL: pgsql/src/include/catalog/pg_control.h,v 1.44 2009/08/31 02:23:23 tgl Exp $
   *
   *-------------------------------------------------------------------------
   */
*************** typedef struct CheckPoint
*** 40,45 ****
--- 40,59 ----
  	TransactionId oldestXid;	/* cluster-wide minimum datfrozenxid */
  	Oid			oldestXidDB;	/* database with minimum datfrozenxid */
  	pg_time_t	time;			/* time stamp of checkpoint */
+ 
+ 	/* Important parameter settings at time of shutdown checkpoints */
+ 	int		MaxConnections;
+ 	int		max_prepared_xacts;
+ 	int		max_locks_per_xact;
+ 	bool	XLogStandbyInfoMode;
+ 
+ 	/*
+ 	 * Oldest XID still running. This is only needed to initialize hot standby
+ 	 * mode from an online checkpoint, so we only bother calculating this for
+ 	 * online checkpoints and only when archiving is enabled. Otherwise it's
+ 	 * set to InvalidTransactionId.
+ 	 */
+ 	TransactionId   oldestActiveXid;
  } CheckPoint;
  
  /* XLOG info values for XLOG rmgr */