16.10 - DataBlockSize - Parallel Transporter

Teradata Parallel Transporter Reference

Parallel Transporter
Release Number
July 2017
Content Type
Programming Reference
Publication ID
English (United States)

Currently, formal testing using the ODBC Operator DataBlockSize attribute has been limited to 3 megabytes. This testing range produced a negative spike in performance that yielded longer elapse time values during the data row acquisition phase. As a result, you should consider, for example, row size, record size, number of columns, and so on to determine the optimal value to assign to the DataBlockSize attribute.

You should not set the job variable DataBlockSize below the system default size of 1MB.