Why and when to perform this task
By default, a single session maps to a single row in the database table used to hold sessions. With this setup, there are hard limits to the amount of user-defined, application-specific data that WebSphere Application Server can access.
Steps for this task
See the DB2 UDB for OS/390 and z/OS V7 Administration Guide for a description of how to drop a DB2 database table.
Creating a DB2 table for session persistence describes how to create a new DB2 database table.