Dynamic and Fixed Virtual Partitions | Teradata Vantage - Dynamic and Fixed Virtual Partitions - Advanced SQL Engine - Teradata Workload Management

Teradata Vantageā„¢ - Workload Management User Guide

Product
Advanced SQL Engine
Teradata Workload Management
Release Number
17.05
17.00
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
dita:mapPath
nbl1556236178169.ditamap
dita:ditavalPath
lze1555437562152.ditaval
dita:id
B035-1197
lifecycle
previous
Product Category
Software
Teradata Vantage

Virtual partitions are allocated a system resource percentage that is, by default, a dynamic (soft) limit. If other virtual partitions are not using their full allocation, then a busy virtual partition can consume more than it is allocated. In contrast, if the system resource percentage is fixed, the virtual partition cannot consume more than allocated, even if other virtual partitions do not use their full allocation. Use the Workload Designer portlet to specify whether a virtual partition allocation is dynamic or a fixed percent.

Workload priority is influenced by the virtual partition resource allocation and whether it is dynamic or fixed. Tactical requests running in a virtual partition with a low resource allocation may not perform as well as those in a virtual partition with a high resource allocation, particularly if the allocation percentage is fixed.