Book Image

SQL Server 2019 Administrator's Guide - Second Edition

By : Marek Chmel, Vladimír Mužný
Book Image

SQL Server 2019 Administrator's Guide - Second Edition

By: Marek Chmel, Vladimír Mužný

Overview of this book

SQL Server is one of the most popular relational database management systems developed by Microsoft. This second edition of the SQL Server Administrator's Guide will not only teach you how to administer an enterprise database, but also help you become proficient at managing and keeping the database available, secure, and stable. You’ll start by learning how to set up your SQL Server and configure new and existing environments for optimal use. The book then takes you through designing aspects and delves into performance tuning by showing you how to use indexes effectively. You’ll understand certain choices that need to be made about backups, implement security policy, and discover how to keep your environment healthy. Tools available for monitoring and managing a SQL Server database, including automating health reviews, performance checks, and much more, will also be discussed in detail. As you advance, the book covers essential topics such as migration, upgrading, and consolidation, along with the techniques that will help you when things go wrong. Once you’ve got to grips with integration with Azure and streamlining big data pipelines, you’ll learn best practices from industry experts for maintaining a highly reliable database solution. Whether you are an administrator or are looking to get started with database administration, this SQL Server book will help you develop the skills you need to successfully create, design, and deploy database solutions.
Table of Contents (17 chapters)
1
Section 1: Provisioning the SQL Server Environment
4
Section 2: Server and Database Maintenance
9
Section 3: High Availability and the Cloud with SQL Server 2019

Performance monitoring overview

How can we define performance? We could say that it is the response time of a request. This means that we recognize which query, database, or whole instance of SQL Server is performing poorly while the response time (from the moment the request was sent by the session until the response information was received by the session) becomes unacceptable by the client. It can be caused by many factors, such as poor query syntax, missing indexes, or even network misconfiguration.

While monitoring and tuning the performance, we must not just measure the response times but also many factors affecting the performance. What's more, we need to find out the root cause for why the system slows down. Based on previous experience, it is good to consider the following points:

  • Number of requests: Just a benchmark value that affects the level of concurrency on data and CPUs used by requests.
  • Space affected by the request: How much data is moved between...