Friday, March 23, 2012
Multiple/Duplicate SQL Server Worker Processes
I know I use one connection object class that is used in all my objects when executing the query (calling Stored Procedures).
The problem is when the first page is rendered and each user control queries the database (SQL Server),
it eventually slows down. In my controls, I use a lot of repeaters and internal queries per each repeater item.
So I know it hits the database quite often.
Problem is when I look in SQL Server Enterprise Manager Process Info, I have multiple worker processes sleeping.
My first thought is ASP.net is creating a new session connection (process) to the SQL Server? Why? How?
What do I do to check either my code is creating the connection object properly. Thanks!
Larry
I have discovered, when I created my connection object for ExecuteNonQuery(), I forgot to Close() the connection.
Since I didn't close the connection object when I was finished... anda few new instances of the connection object was created, it created anew connection object.
In other functions, I was using the DataAdapter which opened and closedthe connection for you, so I took that feature for granted andcompletely forgot to close the connection object when doing aExecuteNonQuery().
I get a doht for the day...
Thanks for taking your time in reading...
Friday, March 9, 2012
Multiple SqlDataSource Controls on a Page
Thanks for your help.
I'm just getting into ASP.NET 2.0 and started using the SqlDataSource control to declaritively connect to a database. I was wondering if I have two SqlDataSource controls on one page with two select commands querying the same database, will the that create to seperate instances of opening and closing the connection to the database, or will it open the database once, execute both queries, and then close the connection. It seems that if it creates two separate connections, it would still be more efficient to to connect to the database programmatically using ADO.NET. You would only need to make one trip to the database, pull down all of your data, and then close the connection.
Adrian
I believe it will open two connections. Which is what you would probably want anyhow. That would allow SQL Server to prioritize and minimize response time.
That said, most of the time you can write code to do things more efficiently than depending on a generic library. It's a trade off, and often the code you may generate may not actually be more efficient unless you are also able to spend the time to implement the more advanced features of the library, in this case, the controls ability to selectively databind and cache data.