Your queries are slow, your server does not have a high cpu and there is still plenty of memory
This might be lock escalation
Sql server need locks to do it's work, thats normal. When a single transaction is changing more than 5000 rows, sql server will not do row locking but will exclusively lock the whole table. During this time, no other operations will be handled until the transaction has been committed or rolled back.
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About the Author
Author: Wim Peeters - Keskon GmbH & Co. KG
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience, including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform.
Latest update: 12/01/2021 | Comment: