Solved

Time out in a SQL Query VB.NET

Posted on 2011-09-17
8
307 Views
Last Modified: 2012-05-12
Hi all,

Im getting the following message when updating records on a SQL Server:

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

The code is very simple:

Dim cadena2 As String = "update available_mills set status=1 where id=99 and location=@f3"
Dim cmd2 As New SqlCommand(cadena2, con2)
cmd2.CommandType = CommandType.Text
cmd2.Parameters.AddWithValue("@f3", F3)
cmd2.ExecuteNonQuery()

This updates about 4000 records every hour

Thanks!
0
Comment
Question by:pvg1975
8 Comments
 
LVL 15

Expert Comment

by:Haris Djulic
ID: 36554544
set connection timeout to max

con2.timeout=0 this will be no time out
0
 

Author Comment

by:pvg1975
ID: 36554559
Im getting

Error      1      'timeout' is not a member of 'System.Data.SqlClient.SqlConnection'.

When using con2.timeout=0
0
 

Author Comment

by:pvg1975
ID: 36554589
I used this:

con2.CreateCommand.CommandTimeout = 0

And it seems to work. Am I doing it right? or createcommand is for something else?

Thanks!
0
 
LVL 15

Accepted Solution

by:
Haris Djulic earned 250 total points
ID: 36554755
it is beter to use the timeout with the command since:

SqlCommand.CommandTimeout = timeout limit for your SQL query. Means, how much time a (eg: SELECT, UPDATE) query can take for its execution. If it exceeds SqlCommand.CommandTimeout, then it stops execution. A command timeout error will occur.

SqlConnection.ConnectionTimeout = timeout limit for your connection. Means, how much time your connection object can try to connect. If it exceeds the specified time, it stops connecting. A connection timeout error will occur.

you can use it like that

cmd2.CommandTimeout =0
0
Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

 

Author Comment

by:pvg1975
ID: 36554888
Thanks, i tried it but i get an error. I will paste the error once im back home. Thanks.
0
 
LVL 7

Expert Comment

by:Kishan Zunjare
ID: 36555928
A sqlConnection has a ConnectionTimeout property. It  is a property which determines the maximum number of seconds your code will wait for a connection to the database to open. It is set in the connectionstring to the database

data source=BROCHIS;initial catalog=Indato;integrated security=SSPI;Connect Timeout=60;

Opening the connection does not do anything in the database yet. That is handled by a SqlCommand, By default this is 30 seconds. When you perform something costly in the database this is the one whose value you’ll have to change.

SqlCommand cmd;

cmd.CommandTimeout = 60;

Hope this will work...
0
 
LVL 75

Assisted Solution

by:Anthony Perkins
Anthony Perkins earned 250 total points
ID: 36556778
There is simply no reason to increase the CommandTimeout (let alone set it to 0-Infinte) for such a simple UPDATE.  All you need to do is optimize your query.

Do you have an index on id, location?
0
 

Author Closing Comment

by:pvg1975
ID: 36556815
That worked perfect. I also optimized the table and added an index to the ID field. Thanks guys!
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Allow user to hide and show datagridview columns 4 17
C# Single Form 8 28
SQL Statement to Update Email Domain 2 21
Access to class from any project within a solution. 6 14
Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
In this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now