Visual Basic® 2010 Unleashed

Controlling PLINQ Queries

PLINQ offers additional extension methods and features to provide more control over tasks that effectively run queries, all exposed by the System.Linq.ParallelEnumerable class. In this section you get an overview of extension methods and learn how you can control your PLINQ queries.

Setting the Maximum Tasks Number

As explained in Chapter 45, the Task Parallel Library relies on tasks instead of threads, although working with tasks basically means scaling processing over multiple threads. You can specify the maximum number of tasks that can execute a thread invoking the WithDegreeOfParallelism extension method, passing the number as an argument. The following code demonstrates how you can get the list of running processes ...