IBM Support

Slow performance (especially in "Trial Balance with Drilldown") caused by fragmented database indexes

Troubleshooting


Problem

Customer has been happily using standard reports within Controller for a while, with good performance. However, then the reports start to run very slowly - in particular “Trial Balance with Drilldown”.

Symptom

Example #1

In one real-life customer example (using Controller 10.1.0) “Trial Balance with Drilldown” took 40 or more seconds to run.

  • This compares with only taking a few (e.g. 4) seconds in the past.

Example #2

In a different real-life customer example (using Controller 10.2.0):

  • Originally, report #1 took 600 seconds (10 minutes)
  • After database optimisation (with rebuild indexes) report #1 took 42 seconds (14 times faster!)

  • Originally, report #2 took 943 seconds
  • After database optimisation (with rebuild indexes) report #2 took 140 seconds (almost 7 times faster!)

[{"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"10.2.1;10.2.0;10.1.1;10.1","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]

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Document Information

Modified date:
08 May 2025

UID

swg21580393