Index: src/backend/postmaster/bgwriter.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/postmaster/bgwriter.c,v
retrieving revision 1.36
diff -c -r1.36 bgwriter.c
*** src/backend/postmaster/bgwriter.c	17 Jan 2007 16:25:01 -0000	1.36
--- src/backend/postmaster/bgwriter.c	19 Mar 2007 19:38:27 -0000
***************
*** 119,124 ****
--- 119,125 ----
  
  	int			num_requests;	/* current # of requests */
  	int			max_requests;	/* allocated array size */
+ 	int64		buffers_written; /* number of buffers written */
  	BgWriterRequest requests[1];	/* VARIABLE LENGTH ARRAY */
  } BgWriterShmemStruct;
  
***************
*** 427,433 ****
  			last_checkpoint_time = now;
  		}
  		else
! 			BgBufferSync();
  
  		/*
  		 * Check for archive_timeout, if so, switch xlog files.  First we do a
--- 428,434 ----
  			last_checkpoint_time = now;
  		}
  		else
! 			BgWriterShmem->buffers_written += BgBufferSync();
  
  		/*
  		 * Check for archive_timeout, if so, switch xlog files.  First we do a
Index: src/backend/storage/buffer/bufmgr.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v
retrieving revision 1.215
diff -c -r1.215 bufmgr.c
*** src/backend/storage/buffer/bufmgr.c	1 Feb 2007 19:10:27 -0000	1.215
--- src/backend/storage/buffer/bufmgr.c	19 Mar 2007 19:38:27 -0000
***************
*** 986,998 ****
   *
   * This is called periodically by the background writer process.
   */
! void
  BgBufferSync(void)
  {
  	static int	buf_id1 = 0;
  	int			buf_id2;
  	int			num_to_scan;
  	int			num_written;
  
  	/* Make sure we can handle the pin inside SyncOneBuffer */
  	ResourceOwnerEnlargeBuffers(CurrentResourceOwner);
--- 986,999 ----
   *
   * This is called periodically by the background writer process.
   */
! int
  BgBufferSync(void)
  {
  	static int	buf_id1 = 0;
  	int			buf_id2;
  	int			num_to_scan;
  	int			num_written;
+ 	int			total_written = 0;
  
  	/* Make sure we can handle the pin inside SyncOneBuffer */
  	ResourceOwnerEnlargeBuffers(CurrentResourceOwner);
***************
*** 1030,1035 ****
--- 1031,1037 ----
  					break;
  			}
  		}
+ 		total_written += num_written;
  	}
  
  	/*
***************
*** 1053,1059 ****
--- 1055,1064 ----
  			if (++buf_id2 >= NBuffers)
  				buf_id2 = 0;
  		}
+ 		total_written += num_written;
  	}
+ 
+ 	return total_written;
  }
  
  /*
Index: src/include/storage/bufmgr.h
===================================================================
RCS file: /cvsroot/pgsql/src/include/storage/bufmgr.h,v
retrieving revision 1.102
diff -c -r1.102 bufmgr.h
*** src/include/storage/bufmgr.h	5 Jan 2007 22:19:57 -0000	1.102
--- src/include/storage/bufmgr.h	19 Mar 2007 19:38:28 -0000
***************
*** 151,157 ****
  
  extern void BufmgrCommit(void);
  extern void BufferSync(void);
! extern void BgBufferSync(void);
  
  extern void AtProcExit_LocalBuffers(void);
  
--- 151,157 ----
  
  extern void BufmgrCommit(void);
  extern void BufferSync(void);
! extern int BgBufferSync(void);
  
  extern void AtProcExit_LocalBuffers(void);