17.00 - Detecting Skew - Teradata Workload Management

Teradata Vantageā„¢ - Workload Management User Guide

prodname
Advanced SQL Engine
Teradata Workload Management
vrm_release
17.00
created_date
June 2020
category
Administration
User Guide
featnum
B035-1197-170K

Either CPU or I/O skew percent exceptions can indicate skew. TASM exceptions detect skewed requests based on the number of AMPs active in the request step. A group-AMP request that uses about the same processing time for each AMP involved would not be detected as skewed, even though some AMPs are not affected by the request.