July 2012
Intermediate to advanced
478 pages
10h 3m
English
Content preview from Microsoft SQL Server 2012 Performance Tuning CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. Tuning with Execution Plans
In this chapter we will cover:
- Understanding Hash, Merge, and Nested Loop Join strategies
- Finding Table/Index Scans in execution plan and fixing them
- Introducing Key Lookups, finding them in execution plans, and resolving them
Introduction
Performance tuning needs concentration in the following areas:
- Deciding the performance baseline of your environment
- Monitoring current performance and finding bottleneck
- Resolving the bottleneck to get good performance
An Estimated Execution Plan is a kind of blue-print that defines how a query should actually perform, whereas an Actual Execution Plan is like a mirror that tells you what happened while executing the query. By looking at this fact you can find the bottleneck and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.