IBM Support

Poor Performance for Report that uses Crosstabs, Lists and Joined Queries

Troubleshooting


Problem

Report with multiple data containers such as Crosstabs and Lists takes a long time to run when reports with similar data volumes complete in less time.

Symptom

Report takes long time to run in Cognos Analytics, from 1 to 2 hours depending on which prompt answers are used when running the report.  Observing the SQL being executed on the database, it is completed in 10 to 15 minutes after report is kicked off, meaning Cognos Analytics is processing the report many times longer than the query executed on the database.

Document Location

Worldwide

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Document Information

Modified date:
15 January 2026

UID

ibm16572741