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IBM Data and AI Ideas Portal for Customers

This portal is to open public enhancement requests against products and services offered by the IBM Data & AI organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (

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Status Not under consideration
Workspace Db2
Created by Guest
Created on Dec 9, 2019

Improving the DBD management design

We had a Db2 load job run that used a load control dataset with 1,764 “INTO TABLE” statements run against a database that had one tablespace with 1,366 tables having 1,306 indexes. The DBD  length = 2628728.


When the job was run, the SYSDBDXA tablespace went from a couple of datasets to 79 datasets of 5,824 cylinders in size.


We opened IBM CASE #: TS002854455, but from the details it appears that Db2 is working as designed.


We were lucky that we did not see this in production and run out of datasets.

This could have been very painful. Our storage folks were adding volumes as fast as they could, but  we could have run out of spare volumes to add and lead to an outage.  We had to cancel the job and rerun it in smaller pieces. 

Needed by Date Dec 31, 2020