Improving Query Optimization with Teradata IPE
Learn about Teradata IPE, a technique that uses additional information collected during query execution to create execution plans in fragments.
Performance Tuning
A collection of 267 issues
The Importance of PDM in Database Compression and Resource Usage Optimization
The importance of the PDM
Compression is a widely used method for reducing IOs by enabling the accommodation of more rows in each data block. Data blocks are the smallest unit exchanged between hard drives and main memory, which is the most costly operation in any database system.
Compression can
Analyzing and Fixing Teradata Statistics Estimation Problem
Learn how to troubleshoot a statistics problem in Teradata. Discover why estimations for a query can be wrong and how to fix them.
Improving Teradata Performance with SQL Query Rewriting
Learn how to improve the performance of SQL statements by rewriting them through this article on Teradata tuning. Follow along as we analyze a high-runtime SQL statement and optimize it to significantly reduce disk I/O and spool space usage.
Throttles in Teradata Workload Management: Usage, Request and Session Limits
What are Throttles used for in Teradata Workload Management?
Throttles restrict concurrent sessions, requests, or utilities to safeguard vital resources, such as CPU, memory, and AMP worker tasks, from depletion. Their implementation in Teradata workload management minimizes contention for resources on highly concurrent systems, thus bolstering overall system performance.
Throttling
Teradata Concurrency Control: Locking and Transactions Explained
Learn how Teradata Concurrency Control uses locking and transactions to prevent simultaneous updates, deletions, or insertions in different sessions.
Teradata SQL Performance: IN vs BETWEEN and the Use of Statistics on Columns
Learn about optimizing SQL queries in Teradata 14.10 by analyzing the execution plan of two queries and using statistics on columns and expressions.
The Importance of Avoiding SQL Functions on WHERE Condition Columns for Optimizer Performance
Learn why it's important to be careful when applying SQL functions on WHERE condition columns and how it can impact query performance.
Improve Query Performance by Using the Teradata CLOB Datatype for Storing Longer Texts
Learn how the Teradata CLOB datatype can improve query performance and reduce resource consumption for storing longer texts in your database.
Teradata Join Optimization: Early and Partial GROUP BY Techniques for Decision Support Workload
Learn how Teradata applies two effective join optimization methods, Early and Partial GROUP BY, for decision support workloads with lots of aggregations. These transformations reduce resource usage and are widely used in modern databases. Discover how to improve the optimizer's chance to apply these