Estimate Time Need to Reassign Maps | Teradata Vantage - 17.00 - 17.05 - About Estimating the Time Needed to Reassign Maps - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Administration

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
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To see an estimate of the time needed for planned map reassignments, you can use any of the following methods:
  • Add the table to DBC.ReconfigRedistOrderTbl and run the Reconfig estimator.
  • Experiment with INSERT-SELECT or ALTER TABLE on sample data.
  • Use DBQL step logging to log CPU and I/O for each step. Scale up the numbers to arrive at an estimate.

Use MONITOR SESSION to compare estimates with actual times.