Symptoms
Assume that you have many concurrent parallel queries that are running on a busy system in SQL Server 2017. When you execute a parallel query, you may notice that the parallel query is forced to run in serial mode because of the lack of parallel worker threads. In this situation, a memory grant usage-warning feature may cause the divide-by-zero error.
Resolution
This issue is fixed in the following cumulative update for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminologythat Microsoft uses to describe software updates.
