I have been having some issues with LINQ-To-SQL around memory usage. I'm using it in a Windows Service to do some processing, and I'm looping through a large amount of data that I'm pulling back from the context. Yes - I know I could do this with a stored procedure but there are reasons why that would be a less than ideal solution.
Anyway, what I see basically is memory is not being released even after I call context.SubmitChanges(). So I end up having to do all sorts of weird things like only pull back 100 records at time, or create several contexts and have them all do separate tasks. If I keep the same DataContext and use it later for other calls, it just eats up more and more memory. Even if I call Clear() on the "var tableRows" array that the query returns to me, set it to null, and call SYstem.GC.Collect() - it still doesn't release the memory.
Now I've read some about how you should use DataContexts quickly and dispose of them quickly, but it seems like their ought to be a way to force the context to dump all its data (or all its tracking data for a particular table) at a certain point to guarantee the memory is free.
Anyone know what steps guarantee that the memory is released?
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