16.10 - Workload Activity Logging and DBQL Logging Comparison - Teradata Workload Management

Teradata Database Workload Management User Guide

Teradata Workload Management
June 2017
User Guide
TASM workload activity logging is automatic and a useful complement to DBQL request logging. At each logging interval, TASM writes summarized details about each workload to the DBC.TDWMSummaryLog table. TASM collects the same summary data in memory and uses it in the Workload Monitor portlet. This data includes the following types:
  • Arrival rate
  • Response time
  • CPU time
  • Request counts for these categories: Active, completed, failed due to error, rejected, delayed (and on which level of throttles), encountered exceptions, requests that move into or out of the workload, and met SLGs.

DBAs can either use the Viewpoint Workload Monitor portlet or develop their own custom reports to see the historical data about workloads that is in the TDWMSummaryLog or various DBQL tables.

No matter what DBQL logging options you use, if TASM finds an exception, it logs information about it in both the exception log and DBQLogTbl. This way, a DBA can follow up on the information.