This is something I touched on back in 2017 a little after the Live Query Statistics feature was introduced with SQL 2016, but I was using the functionality this morning and felt like it was worth a reminder.
https://matthewmcgiffen.com/2017/02/23/livequerystats/
You can use Live Query Stats to check on the progress of an executing query – and you can do it through the GUI in SSMS.
I created a long running query for a demo, and after 15 minutes I was still waiting for it to finish. That was a bit longer than I intended. Should I kill it – or did I just need to wait a few more minutes for it to complete.
You can check this quickly via the Activity Monitor:
Find the query you are interested in in the processes list:
Right-click and select “Show Live Execution Plan”. That will show you something like this:
I can see from this that my query is about 83% complete, so maybe I’ll just wait a little longer. Note that this is a live view, so the numbers keep updating. If I want I can watch the progress.
This is against a SQL 2019 instance and is the out of the box behaviour. Before SQL 2019 you had to enable trace flag 7412 if you wanted this to work:
DBCC TRACEON(7412,-1);
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I believe that 83% in the screenshot is not the progress of query and rather how close the actual and estimates rows are off. So that’s an 83 % match what i believe it to be
It’s the progress of the query against the estimates – so if the estimates are accurate the progress will be also – but if the estimates are off, then the progress will be off by the same amount.