Marc Holze Norbert Ritter Autonomic Databases: Detection of Workload Shifts with n-Gram-Models. 127-142 2008 ADBIS http://dx.doi.org/10.1007/978-3-540-85713-6_10 conf/adbis/2008 db/conf/adbis/adbis2008.html#HolzeR08