If I have two servers (server A and server B) that are part of the same Availability Group failover cluster, and a query running on server A has an execution plan that uses parallelization, is it possible for that query to use cores from a processor on server B?
Sql-server – Can a query whose execution plan uses parallelization use the cores of a processor on a another server that’s part of the same Availability Group
availability-groupsclusteringparallelismsql serversql-server-2017
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Best Answer
No, execution plan parallelization refers to using multiple cores on the server executing the query. Parallelize plans are not executed across availability group replicas.