Set gp_appendonly_insert_files to 0 by default.

If you want to prepare AO/AOCO files for parallel query,
set it before data insertion.

Authored-by: Zhang Mingli avamingli@gmail.com

Author: avamingli

src/backend/utils/misc/guc_gp.c

@@ -3534,7 +3534,7 @@ struct config_int ConfigureNamesInt_gp[] =
 			NULL
 		},
 		&gp_appendonly_insert_files,
-		4, 0, 127,
+		0, 0, 127,
 		NULL, NULL, NULL
 	},