17.10 - Limiting Use of the FREESPACEPERCENT Option - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Publication ID
English (United States)
The FREESPACEPERCENT option of PACKDISK is not intended for routine use. It is intended for exceptional situations, such as:
  • Preliminary tests scoped to a small prototype table to determine the optimal value for the FSP.
  • Later tests of various FSPs on live tables that might require adjustment to ensure more optimal cylinder packing in the future.

The AutoCylPack background task runs periodically to return cylinder FSPs to the levels specified when tables were created or modified, or, if no FSP was specified for the tables, AutoCylPack returns cylinders to the system default for FSP defined in DBS Control.

If the PACKDISK FREESPACEPERCENT option is used to explicitly specify a different FSP value for a PACKDISK run, the AutoCylPack background task will, at some point, return the FSP values to those defaults.