Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







recv_buf_size and send_buf_size tips

Oracle Database Tips by Donald BurlesonApril 20, 2015

Question:  I have seen your great notes on Oracle network tuning and I saw this note on recv_buf_size and send_buf_size in the sqlnet.ora file:

"Starting in Oracle10g, if you are tuning your network to maximize throughput (as opposed to tuning for fast response time), Oracle suggests setting recv_buf_size and send_buf_size sqlnet.ora parameters equal to 3 times the Bandwidth Delay Product (BDP) value.."

How do I set the optimal values for the send_buf_size and recv_buf_size?

Answer:  As the name implies, the recv_buf_size and send_buf_size parameters in the sqlnet.ora file determine the size (in bytes) of the socket receive and send buffers for a SQL*Net connection.

The Oracle documentation suggests an arbitrarily high values for your send_buf_size and recv_buf_size, large enough to accommodate the largest possible packet size, not not too large. 

The optimal setting for send_buf_size and recv_buf_size is a tradeoff between slow network transmission (multiple packets required) vs. wasting RAM resources.

To prevent network contention, the values for recv_buf_size and send_buf_size should be set to the maximum amount of data that might be sent, at least 3x the value of your bandwidth delay product (BDP).  See these notes on computing your BDP value.

Remember, RAM is cheap, and a large Oracle*Net transmission and receive RAM buffer size can prevent network wait outages.

Get the Complete
Oracle SQL Tuning Information 

The landmark book "Advanced Oracle SQL Tuning  The Definitive Reference"  is filled with valuable information on Oracle SQL Tuning. This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher.




Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.



Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster