16.10 - Enabling Step Logging To Aid in Map Analysis - Teradata Database

Teradata Database Administration

Product
Teradata Database
Release Number
16.10
Release Date
April 2018
Content Type
Administration
Publication ID
B035-1093-161K
Language
English (United States)

Before analyzing how tables use maps, you can optionally enable DBQL step logging. The information step logging collects helps Teradata decide which tables to keep together for join processing efficiency when redistributing tables. For example:

BEGIN QUERY LOGGING WITH STEPINFO ON ALL;

Teradata recommends leaving logging on for 7 days to capture a set of queries that are representative of the workload on your system.

If there is no step logging, Teradata groups tables by database when redistributing them.