Index: src/gnome-system-monitor.schemas.in
===================================================================
--- src/gnome-system-monitor.schemas.in.orig
+++ src/gnome-system-monitor.schemas.in
@@ -695,7 +695,7 @@
       <applyto>/apps/procman/proctree/col_15_visible</applyto>
       <owner>procman</owner>
       <type>bool</type>
-      <default>TRUE</default>
+      <default>FALSE</default>
       <locale name="C">
         <short>Show process 'estimated memory usage' column on startup</short>
         <long></long>