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Troubleshooting Distributed Query Performance Issues (Doc ID 1921358.1)

Last updated on SEPTEMBER 20, 2022

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database - Personal Edition - Version and later
Oracle Database - Standard Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Information in this document applies to any platform.


 This document outlines how to approach issues with queries that involve remote objects.

For earlier version there is a legacy version of this document here:

<Document 33838.1> Determining the execution plan for a distributed query (9i and below)


Troubleshooting Steps

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In this Document
Troubleshooting Steps
 How Oracle Processes Distributed Queries
 Troubleshooting Distributed Queries
 How To Determine The SQL Statement(s) Sent To The Remote Database
 Distributed Query Examples
 Example 1 - Select using 2 remote tables and 1 local table:
 Example 2 - Select using 1 remote view and 1 local table.
 Example 3 - All remote tables.

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