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SQL Server 2017 Developer???s Guide
book

SQL Server 2017 Developer???s Guide

by Dejan Sarka, Miloš Radivojević, William Durkin
March 2018
Intermediate to advanced content levelIntermediate to advanced
816 pages
19h 35m
English
Packt Publishing
Content preview from SQL Server 2017 Developer???s Guide

Query Store architecture

Query Store is integrated with the query processor in the database engine. A simplified Query Store architecture in SQL Server 2017 is shown in the following figure:

Query Store architecture

Query Store actually has three stores:

  • Query and Plan Store: This stores information about executed queries and execution plans used for their execution
  • Runtime Statistics store: This store holds aggregated execution parameters (execution time, logical reads, and so on) for executed queries within a specified time
  • Wait Stats Store: This store persists wait statistics information

All three stores have instances in memory and persisted ...

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Publisher Resources

ISBN: 9781788476195Supplemental Content