DBS Control Parameters for Tuning the Workload Cache Limits for Index and Partition Analysis - Teradata Database

Teradata Database Administration
Product
Teradata Database
Release Number
15.10
Language
English (United States)
Last Update
2018-10-06
Product Category
Software

DBS Control Parameters for Tuning the Workload Cache Limits for Index and Partition Analysis

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 Utilities 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.

    This parameter is applicable to all SQL statements issued within a session when DIAGNOSTIC “Validate Index” has been enabled.

    1 - 32

    48