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Cannot reduce Cassandra diskspace from pxdecisionresults dataset



Unable to reduce the disk space which unexpired pxDecisionResults Cassandra dataset records, occupy.

Error Messages

Not Applicable

Steps to Reproduce

Not Applicable

Root Cause

A defect in Pegasystems’ code or rules.
The default Time To Live (TTL) of 30 days was not enforced.


Apply HFix-43364.

To expire pre-Hotfix records on which TTL is not applied, resave the records with a TTL value. After the time has elapsed, all the records expire. As a result, the disk space is reclaimed by clearing the old unexpired records.

Use a filter to perform this operation on the entire or selective data.

Perform the below setups to apply TTL on the pxDecisionResults dataset:
  1. Create a Data Flow rule in the Data-Decision-Results class. 

  2. As a Data source, select the 'pxDecisionResults' dataset.

  3. Add a Filter component to implement any filter criteria.
  4. Select the pxDecisionResults dataset as the Destination dataset

  5. Select the 'Specify the Time to live (in seconds)' checkbox.
  6. Enter a value in seconds. The records expire and are deleted.

Published January 16, 2020 - Updated October 8, 2020

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