You're reading from SQL Server 2019 Administrator's Guide A definitive guide for DBAs to implement, monitor, and maintain enterprise database solutions

Product type Paperback

Published in Sep 2020

Publisher Packt

ISBN-13 9781789954326

Length 522 pages

Edition 2nd Edition

Languages

SQL

Tools

SQL Server

Concepts

Database Administration

Authors (2):

Marek Chmel

Vladimír Mužný

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Table of Contents (17) Chapters

Preface

1. Section 1: Provisioning the SQL Server Environment

2. Chapter 1: Setting Up SQL Server 2019 FREE CHAPTER

3. Chapter 2: Keeping Your SQL Server Environment Healthy

4. Section 2: Server and Database Maintenance

5. Chapter 3: Implementing Backup and Recovery

6. Chapter 4: Securing Your SQL Server

7. Chapter 5: Working with Disaster Recovery Options

8. Chapter 6: Indexing and Performance

9. Section 3: High Availability and the Cloud with SQL Server 2019

10. Chapter 7: Planning Migration and Upgrade

11. Chapter 8: Automation – Using Tools to Manage and Monitor SQL Server 2019

12. Chapter 9: Configuring Always On High Availability Features

13. Chapter 10: In-Memory OLTP – Why and How to Use it

14. Chapter 11: Combining SQL Server 2019 with Azure

15. Chapter 12: Taming Big Data with SQL Server

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Accelerated Database Recovery

The described recovery process ensures that every database is in its last known consistent state after SQL Server's startup. The recovery process could take a long time in some cases. A common situation would be when SQL Server is stopped (sometimes unexpectedly) when some long-running transaction is being executed. The recovery process takes almost the same time as executing the transaction. It leads to unacceptable database unavailability. SQL Server 2019 brings a new database-scoped feature that bypasses this issue. The feature is called Accelerated Database Recovery (ADR). ADR basically keeps track of changes in data using internal row versioning. When SQL Server stops working and is restarted, SQL Server does not recover all the transactions from the transaction log, but simply recovers the proper versions of the records from the in-database row version store.

To turn on ADR, we can use the following Data Definition Language (DDL) statement...