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Massive SQL Transaction Logs caused by rebuilding SQL indexes

Troubleshooting


Problem

Customer notices that their Controller database's transaction log file (LDF) is regularly getting exceptionally large.

Symptom

In one real-life customer example, the transaction log (LDF file) grew by approximately 100Gb in 24 hours.

[{"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","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:
09 May 2025

UID

swg22006683