From af60666e7b0751fea1a73e2b61a66a3b01665fde Mon Sep 17 00:00:00 2001
From: octo <octo>
Date: Thu, 6 Apr 2006 06:03:30 +0000
Subject: [PATCH] Fixed/changes the memory graph in collection.cgi to work even
 if `page cache' and/or `buffer cache' is undefined.

---
 contrib/collection.cgi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/contrib/collection.cgi b/contrib/collection.cgi
index 63b15639..51e187de 100755
--- a/contrib/collection.cgi
+++ b/contrib/collection.cgi
@@ -303,8 +303,10 @@ our $GraphDefs;
 			'DEF:free_max={file}:free:MAX',
 			'DEF:buffers_max={file}:buffers:MAX',
 			'DEF:cached_max={file}:cached:MAX',
-			'CDEF:free_cached_buffers_used=free_avg,cached_avg,+,buffers_avg,+,used_avg,+',
-			'CDEF:cached_buffers_used=cached_avg,buffers_avg,+,used_avg,+',
+			'CDEF:cached_avg_nn=cached_avg,UN,0,cached_avg,IF',
+			'CDEF:buffers_avg_nn=buffers_avg,UN,0,buffers_avg,IF',
+			'CDEF:free_cached_buffers_used=free_avg,cached_avg_nn,+,buffers_avg_nn,+,used_avg,+',
+			'CDEF:cached_buffers_used=cached_avg,buffers_avg_nn,+,used_avg,+',
 			'CDEF:buffers_used=buffers_avg,used_avg,+',
 			"AREA:free_cached_buffers_used#$HalfGreen",
 			"AREA:cached_buffers_used#$HalfBlue",
-- 
2.11.0