Question

In my .net application, I have used LINQ-to-SQL to get some data from the database. The volume of data is not big at all (10 rows of data). But I constantly caught the “system.outofmemoryException” in my function even thought there is still spare memory in the server. Interestingly, I can still get the data with a ADO function from other pages.

The problem will be fixed once application pool restarts. From time to time, issue happen again. Do you have any clue how I should debug this scenario?

Note: I have used “using” block for all datacontext connection. Literally, All datacontext would be disposed after use.

Below is the code. It is simple.

using (StoreDataContext db = new StoreDataContext(conn)) 
{
     var list = from category in db.ProductCategories 
                select category;

     ddlCategory.DataSource = list.Distinct().ToList();
     ddlCategory.DataTextField = "CategoryName";
     ddlCategory.DataValueField = "CategoryName";
     ddlCategory.DataBind();
}

Answer 1

My suggestion would you use memory profiling tool such as JetBrains dotTrace or RedGate’s Ants Profiler (their are more in the market)

Personal experience even I had the same issue on my web application and dotTrace traced the poorly written code for me