Best Practices for Detecting Query Bottlenecks

This guide provides best practices for identifying and resolving bottlenecks in query performance within the Denodo Platform. It is the fourth document in a series aimed at optimizing performance, specifically focusing on scenarios where queries do not meet expected performance levels. The document outlines the architecture of Denodo and the execution process involved in querying data from various sources. It details how to identify the dominant factor causing performance issues, whether it be the client, the data source, or the Denodo server itself. The guide includes sections on execution plan basics, which serve as a tool for troubleshooting poor query performance, and offers a structured approach to diagnosing and solving bottlenecks. Additionally, it emphasizes the importance of analyzing execution traces and provides guidelines for interpreting the results to determine the root cause of performance degradation. This document is intended for Denodo administrators and developers seeking to enhance query efficiency.