Assume that you have Microsoft SQL Server 2016installed in a high-end server. When there are many incoming ad hoc queries, concurrentquery compilations occur in the context of the sqlsource_transform system transaction, and you may notice that CPU utilization is very high.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes andsecurity fixes that were in the previous build. We recommend that you installthe latest build for your version of SQL Server: