Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v
retrieving revision 1.497
diff -c -c -r1.497 guc.c
*** src/backend/utils/misc/guc.c	9 Mar 2009 14:34:34 -0000	1.497
--- src/backend/utils/misc/guc.c	2 Apr 2009 19:52:49 -0000
***************
*** 1713,1719 ****
  	},
  
  	{
! 		{"effective_io_concurrency", PGC_USERSET, RESOURCES,
  			gettext_noop("Number of simultaneous requests that can be handled efficiently by the disk subsystem."),
  			gettext_noop("For RAID arrays, this should be approximately the number of drive spindles in the array.")
  		},
--- 1713,1725 ----
  	},
  
  	{
! 		{"effective_io_concurrency",
! #ifdef USE_PREFETCH
! 		PGC_USERSET,
! #else
! 		PGC_INTERNAL,
! #endif
! 		RESOURCES,
  			gettext_noop("Number of simultaneous requests that can be handled efficiently by the disk subsystem."),
  			gettext_noop("For RAID arrays, this should be approximately the number of drive spindles in the array.")
  		},