NHibernate, the Parallel Framework, and SQL Server
- by andy
hey guys, we have a loop that:
1.Loops over several thousand xml files. Altogether we're parsing millions of "user" nodes.
2.In each iteration we parse a "user" xml, do custom deserialization
3.finally, in each iteration, we send our object to nhibernate for saving. We use:
.SaveOrUpdateAndFlush(user);
This is a lengthy process, and we thought it would be a perfect candidate for testing out the .NET 4.0 Parallel libraries. So we wrapped the loop in a:
Parallel.ForEach();
After doing this, we start getting "random" Timeout Exceptions from SQL Server, and finally, after leaving it running all night, OutOfMemory unhandled exceptions.
I haven't done deep debugging on this yet, but what do you guys think. Is this simply a limitation of SQL Server, or could it be our NHibernate setup, or what?
cheers
andy
