Developers Choice: Query progress – anytime, anywhere
'One of the most important actions when a performance issue hits, is to get precise understanding on the workload that’s executing and how resource usage is being driven. The actual execution plan is an invaluable tool for this purpose.
Query completion is a prerequisite for the availability of an actual query plan, but with LQS (Live Query Statistics), you can already get information about in-flight query executions (see this blog post), which is especially useful for long running queries, and queries that run indefinitely and never finish.'...
https://blogs.msdn.microsoft.com/sql_server_team/query-progress-anytime-anywhere/
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