Improve comment about why sleep is used by pg_standby to handle 'copy'

file size problem.

diff --git a/contrib/pg_standby/pg_standby.c b/contrib/pg_standby/pg_standby.c
index 4582f54585c8bacb1401ecac5822a4ae1fd92b04..5fd1d842c4b81077fc21d959fa2254e5706dd7bc 100644 (file)
--- a/contrib/pg_standby/pg_standby.c
+++ b/contrib/pg_standby/pg_standby.c
@@ -1,5 +1,5 @@
 /*
- * $PostgreSQL: pgsql/contrib/pg_standby/pg_standby.c,v 1.15 2008/12/15 21:39:25 momjian Exp $ 
+ * $PostgreSQL: pgsql/contrib/pg_standby/pg_standby.c,v 1.16 2008/12/15 22:13:02 momjian Exp $ 
  *
  *
  * pg_standby.c
@@ -179,12 +179,11 @@ CustomizableNextWALFileReady()
 #ifdef WIN32
 
            /*
-            * Windows reports that the file has the right number of bytes
-            * even though the file is still being copied and cannot be opened
-            * by pg_standby yet. So we wait for sleeptime secs before
-            * attempting to restore. If that is not enough, we will rely on
-            * the retry/holdoff mechanism.  GNUWin32's cp does not have
-            * this problem.
+            * Windows 'cp' sets the final file size before the copy is
+            * complete, and not yet ready to be opened by pg_standby.
+            * So we wait for sleeptime secs before attempting to restore.
+            * If that is not enough, we will rely on the retry/holdoff
+            * mechanism.  GNUWin32's cp does not have this problem.
             */
            pg_usleep(sleeptime * 1000000L);
 #endif