FIX: SQL Server 2016 Database Mail causes high CPU usage after many email messages are sent

Symptoms

After you send many email messages by using SQL Server 2016 Database Mail, your CPU usage is higher than expected.

Cause

This issue occurs because Database Mail creates an orphan System.Timers.Timer object in every loop iteration of the queue processor.

Resolution

This issue is fixed in the following cumulative updates for SQL Server:

Cumulative Update 1 for SQL Server 2016 Service Pack 1 (SP1)

Cumulative Update 4 for SQL Server 2016

About the cumulative update


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 terminology that Microsoft uses to describe software updates.
Properties

Article ID: 3197879 - Last Review: 18 Jan 2017 - Revision: 8

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