My Oracle Support Banner

Resolving Issues Where Waits for 'SQL*Net message from dblink' Occur Because a Remote Portion of a Query is Slow (Doc ID 1474910.1)

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.


Dislaimer: This note is written in the context that the Performance Guided Resolution tool was used and recommended this article. It may not make as much sense if read standalone or by other audiences.

Troubleshooting Steps

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
Troubleshooting Steps
 Brief Definition:
 Problem Confirmation:
 Improving the performance of the remote portion of the query
 How to determine that a 'remote' section is slow?
 Is the remote part of the query slow because it uses a bad access path or is the problem that it is distributed?
 Improving the performance of the distribution of the query
 Network speed
 Network calls
 Distributed Query optimization on local database
 Measuring Success
 Known Issues

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.