Myths and Misconceptions about Locking & Blocking

2022

TL; DR

You know the various Transaction Isolation Levels and Locking/Blocking very well in SQL Server? If yes, come and join my session where I will talk about various Myths and Misconceptions around Locking & Blocking that I have encountered over the years.

Session Details

You know the various Transaction Isolation Levels and Locking/Blocking very well in SQL Server? If yes, come and join my session where I will talk about various Myths and Misconceptions around Locking & Blocking that I have encountered over the years. We will take a whirl tour through some edge cases that will change forever how you think about Locking & Blocking in SQL Server. During this session we will cover the following areas: *) NOLOCK can block! *) Shared Locks are blocking Shared Locks! *) Read Committed behaves as Repeatable Read *) Online Index Operations are not Online Index Operations!

3 things you'll get out of this session

Klaus Aschenbrenner's previous sessions

SQL Server 2014 In-Memory OLTP Deep Dive

Hekaton is the Greek word for 100 - the goal of In-Memory OLTP in SQL Server 2014 is to improve query performance up to 100 times. In this session we will look under the cover of Hekaton and the Multi Version Concurrency Control (MVCC) principles.

Headache guaranteed: Deadlocking in SQL Server!

SQL Server needs its locking mechanism to provide the isolation aspect of transactions. As a side-affect your workload can run into deadlock situations - headache for you as a DBA is guaranteed!

Latches, Spinlocks, and Lock Free Data Structures

Join this session to make a deep dive into how SQL Server implements physical locking with lightweight synchronization objects like Latches and Spinlocks.

The dangerous beauty of Bookmark Lookups

Join me in this session to get a basic understanding of Bookmark Lookups, and why they can be dangerous in SQL Server.

Troubleshooting the most difficult SQL Server problems

Do you have enough from "normal" performance tuning sessions? You can't hear anything about Indexing and Execution Plans anymore? Then you are right in this session!

Troubleshooting TempDb

For the most DBAs and DEVs the TempDb is a crystal ball. But the TempDb is the most critical component in a SQL Server installation and is used by your applications and also internally by SQL Server.

SQL Server 2008 Database Internals

Do you already wanted to know how SQL Server 2008 stores a database file physically on the hard drive? In this session you will learn the internal structure of a SQL Server 2008 database file.

Understanding SQL Server Execution Plans

Do you know SQL Server Execution Plans? Yes! - and can you read/analyze them? No... For the beginner it is not very easy to understand and explain execution plans generated by SQL Server for your queries.

Advanced SQL Server 2008 Troubleshooting

It's Friday, 05:00pm. You are just receiving an email that informs you that your SQL Server has enormous performance problems! What can you do? How can you identify the problem and resolve it fast?

Service Broker: Message in a bottle

Service Broker: Message in a bottle