Index: src/backend/access/transam/xlog.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v
retrieving revision 1.181
diff -c -c -r1.181 xlog.c
*** src/backend/access/transam/xlog.c	12 Feb 2005 23:53:37 -0000	1.181
--- src/backend/access/transam/xlog.c	17 Mar 2005 04:31:32 -0000
***************
*** 69,74 ****
--- 69,79 ----
  #endif
  #endif
  
+ #if defined(WIN32)	/* Fastest on Win32 using FILE_FLAG_WRITE_THROUGH */
+ #define DEFAULT_SYNC_METHOD_STR    "open_sync"
+ #define DEFAULT_SYNC_METHOD		   SYNC_METHOD_OPEN
+ #define DEFAULT_SYNC_FLAGBIT	   OPEN_SYNC_FLAG
+ #else
  #if defined(OPEN_DATASYNC_FLAG)
  #define DEFAULT_SYNC_METHOD_STR    "open_datasync"
  #define DEFAULT_SYNC_METHOD		   SYNC_METHOD_OPEN
***************
*** 84,89 ****
--- 89,95 ----
  #define DEFAULT_SYNC_FLAGBIT	  0
  #endif
  #endif
+ #endif
  
  
  /* User-settable parameters */