One sql processes using more than 600 threads

Question

Looking at sp_who2, there is a single process with 600 rows in it and other process are waiting for it to finish.

Is there any way I can limit the maximum number of threads a process can use in Sql Server 2016

Answer 1

Hi MukeshGupta-1553,

there is a single process with 600 rows in it and other process are waiting for it to finish.

Do you mean a running query that takes a long time to execute is blocking other processes?
If so, the solution to this type of blocking problem is to look for ways to optimize the query.
After verifying that the correct indexes exist, and that there are no hints limiting the optimizer's ability to generate an efficient plan, you can examine the query execution plan.
Please refer to Troubleshoot slow-running queries which might help.
You can also use Query Store, which gives you insight into query plan choices and performance.

Best Regards,
Amelia

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Answer 2

Yes a single query but my question is if I can limit the number of parallel threads a query can use.

It's a third party database so I don't have much control over changing their code or redesigning indexes.

Answer 3

You can configure "Max Degree of Parallelism"

https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/configure-the-max-degree-of-parallelism-server-configuration-option?view=sql-server-ver15