Another option is the Online Training Course "Microsoft Dynamics NAV 2009: C/SIDE Solution Development - Optimizing for SQL Server" available at Learning.Microsoft.com. I just went through this course while preparing for my NAV2009 solution development certification. It has a good section on why table locking occurs and how to avoid them.
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https://mbs.microsoft.com/partnersource ... rcekit.htm
be smart before being a clever.