SQL Server 2017 Query Performance Tuning: Troubleshoot and Optimize Query Performance

© Grant Fritchey 2018

Grant FritcheySQL Server 2017 Query Performance Tuninghttps://doi.org/10.1007/978-1-4842-3888-2_21

21. Blocking and Blocked Processes

Grant Fritchey¹ 

(1)

Grafton, Massachusetts, USA

 

You would ideally like your database application to scale linearly with the number of database users and the volume of data. However, it is common to find that performance degrades as the number of users increases and as the volume of data grows. One cause for degradation, especially associated with ever-increasing scale, is blocking. In fact, database blocking is usually one of the biggest enemies of scalability for database applications.

In this chapter, I cover the following topics:

• The fundamentals of blocking in SQL Server

• The ACID properties of ...