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_2

2. Memory Performance Analysis

Grant Fritchey¹ 

(1)

Grafton, Massachusetts, USA

 

A system can directly impact SQL Server and the queries running on it in three primary places: memory, disk, and CPU. You’re going to explore each of these in turn starting, in this chapter, with memory. Queries retrieving data in SQL Server must first load that data into memory. Any changes to data are first loaded into memory where the modifications are made, prior to writing them to disk. Many other operations take advantage of the speed of memory in the system, such as sorting data using an ORDER BY clause in a query, performing calculations to create ...