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How to fix Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding

, 2 Aug 2013 CPOL
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Insert Ignore with select thousands of rows threw timeout expired exception

Using MySQL .NET /Connector with a thousands of rows to do an INSERT IGNORE command results in timeout expired exception. Normally we focus in connection time out or command timeout etc.

But in this case, the problem is with  net_read_timeout, because the command needs to read thousands of rows before to do the task.

The best way to fix it, is to increase the net_read_timeout (by default is only 30 seconds see mysql website) so, you allow the command sufficient seconds to read. If not, the connection will close, because net_read taked more time than the timeout setted.

So you need to type this in any MySQL Console or any User Interface like MySQL Workbench, you need to have administration permissions to change global variables: 

SET GLOBAL   net_read_timeout = 100; 


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

AlbertoLeon CSharpMan
Technical Lead Get Me An Apartment
Spain Spain
I'm developer fall in love with C#, .NET and Mono.
Designing and programming websites since 2001.
I like literature (to read and to write), playing football (soccer)... and of course I'm great fan of La Roja (Spain football team)

At now I work in GetMeAnApartment, I do Research and Development features to upgrade our website (, MVC, MySQL) and business model (rental short stay apartments)

My Knowledge:
LANGUAGES: C#, XML, HTML, JavaScript, ActionScript, php, VisualBasic Script

TECHNOLOGIES:, mvc, php, flash, GTK#

APPLICATIONS: wordpress, wikimedia, I programmed modules for Macromedia Flash MX for myself

FRAMEWORKS: .Net Framework, Mono

SERVERS: IIS, apache2

SO: Windows, Debian

SOFTWARE: Visual Studio 2010, 2008. Monodevelop. Glade. Illustrator. Indesign. Photoshop. Dreamweaver.


IT Director and website developer, 2010 - present

Círculo Rojo Publicidad y Comunicación
IT Director and websites developer, 2007 - 2010

Dédalo Creative
Co-founder,Programmer and Developer, Graphical designer 2006 - 2007

Costa Mediterránea Comunicación
Chief writer, 2004 - 2006

Stalker Creacion
Web designer and developer, 2001 - 2003

Designer and Programmer, 2001 - present

Jaime I, University
Advertising, 2000 - 2005

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Comments and Discussions

GeneralMy vote of 3 Pin
satish koladiya27-Aug-13 0:41
professionalsatish koladiya27-Aug-13 0:41 
GeneralMy vote of 5 Pin
fredatcodeproject2-Aug-13 7:02
memberfredatcodeproject2-Aug-13 7:02 

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