Index Wizard processing in Teradata Database allocates workload cache for the purpose of caching information retrieved from the QCD and other temporary working structures and needed during Analysis and Validation phases of recommending indexes and partitioning expressions for various SQL workloads.
Two DBS Control performance group parameters control the respective workload cache sizes for the Analysis and Validation phases:
- IAMaxWorkloadCache
- IVMaxWorkloadCache
The following table provides some of the details for these parameters. See Teradata Vantage™ - Database Utilities , B035-1102 for further information.
| Parameter | Purpose | Valid Range (megabytes) | Default (megabytes) |
|---|---|---|---|
| IAMaxWorkloadCache | Defines the maximum size of the Index Wizard workload cache for Analysis operations. This parameter is applicable to both the INITIATE INDEX ANALYSIS and INITIATE PARTITION ANALYSIS statements. |
32 - 256 | 8 |
| IVMaxWorkloadCache | Defines the maximum size of the Index Wizard workload cache for Validation operations. Validation is only performed under the direction of Teradata Support Center personnel. | 1 - 32 | 48 |