17.10 - DefaultRowGroupSize - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

Purpose

Determines the size of RowGroups used while creating Parquet files if a value is not explicitly provided through user query.

Field Group

Native Object Store

Valid Settings

4 to 16 MB

Default

16 MB

Changes Take Effect

After the DBS Control Record has been written.

Usage Notes

  • There is a chance of higher main memory usage when the row group size is large.
  • Main memory usage depends on the number of columns in the table.

Related Topics

The following fields affect the NOS feature and foreign table access.