If you create broker databases in DB2, you must ensure that
the Database Heap Size is set to 900 (4 KB pages).
To change the Heap Size on Windows
Start the DB2 Control Center.
For each database you have created:
Right-click the database name in the object tree and select Configure
Parameters.
In the window that opens, select Performance > DBHEAP. You can reset this
within the range 32 to 60000, but are recommended to choose a value of at
least 900.
Click OK.
To change the Heap Size on UNIX platforms
Open a command window.
Enter the db2 command with the parameters shown, specifying the
number of pages required:
db2 update database configuration for WBRKBKDB using dbheap 900