Perform Preupgrade Tasks for IBM DB2
Perform the tasks in Preparing an IBM DB2 Database for a Siebel Upgrade
Make sure that all transactional tables with clustering indexes are at least 90% clustered and stats are current.
Note: You might be required to perform runstats on a small number of transactional tables and indexes following a successful upgrade. All Siebel Enterprise Integration Manager tables will have been replaced and might need statistics gathered.