CPU Disk Ratio | Teradata Vantage - 17.10 - CPU Disk Ratio - Advanced SQL Engine - Teradata Workload Management

Teradata Vantage™ - Workload Management User Guide

Product
Advanced SQL Engine
Teradata Workload Management
Release Number
17.10
Release Date
July 2021
Content Type
Administration
User Guide
Publication ID
B035-1197-171K
Language
English (United States)

The CPU Disk Ratio exception detects requests that have an unusually high ratio of CPU use versus logical I/Os. One example of this is an accidental unconstrained product join on a very large table. This metric is also called the product join indicator (PJI). Other legitimate requests, such as full table scans, can also be CPU-intensive, however.