--- updatedb.cron.daily.orig	2009-07-21 09:13:10.000000000 +0200
+++ updatedb.cron.daily	2009-07-21 09:13:29.000000000 +0200
@@ -1,5 +1,10 @@
 #!/bin/sh
 
+# check if ionice is present and use it then
+if [ -x /usr/bin/ionice ]; then
+  /usr/bin/ionice -c3 -p$$
+fi
+
 # Update the "locate" database
 if [ -x /usr/bin/updatedb ]; then
   if [ -f /etc/updatedb.conf ]; then