Sql Server Concurrency Locking Blocking And Row Versioning
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Sql Server Concurrency
If you've designed your SQL code intelligently, and implemented a sensible indexing strategy, there's a good chance your queries will fly, when tested in isolation. In the real world, however, where multiple processes can access the same data at the same time, SQL Server often has to make one process wait, sacrificing concurrency and performance, in order that in order that all can succeed, without destroying data integrity. Transactions are at the heart of concurrency. I explain their ACID properties, the transaction isolation levels that dictate the acceptable behaviors when multiple transactions access the same data simultaneously, and SQL Server's optimistic and pessimistic models for mediating concurrent access. Pessimistic concurrency, SQL Server's default, uses locks to avoid concurrency problems. I explain all the different locks and their compatibility. I show how to control locking with hints and bound connections, and how to troubleshoot excessive blocking and deadlocking. Optimistic concurrency uses row versions to support concurrency.I explain how row versioning works, cover SQL Server's two Snapshot-based isolation levels and offer troubleshooting tips for issues such as update conflicts. Your application can have world-class indexes and queries, but they won't help you if you can't get your data, because another application has it locked. That's why every DBA and developer must understand SQL Server concurrency, and how to troubleshoot any issues. I hope my book helps!
Microsoft SQL Server 2012 Internals
Dive deep inside the architecture of SQL Server 2012 Explore the core engine of Microsoft SQL Server 2012—and put that practical knowledge to work. Led by a team of SQL Server experts, you’ll learn the skills you need to exploit key architectural features. Go behind the scenes to understand internal operations for creating, expanding, shrinking, and moving databases—whether you’re a database developer, architect, or administrator. Discover how to: Dig into SQL Server 2012 architecture and configuration Use the right recovery model and control transaction logging Reduce query execution time through proper index design Track events, from triggers to the Extended Event Engine Examine internal structures with database console commands Transcend row-size limitations with special storage capabilities Choose the right transaction isolation level and concurrency model Take control over query plan caching and reuse
SQL Server Mastery: Advanced Techniques for Database Optimization and Administration
"SQL Server Mastery: Advanced Techniques for Database Optimization and Administration" is the ultimate resource for those seeking to excel in the sophisticated realm of SQL Server management and development. Crafted for database administrators, developers, and data analysts alike, this comprehensive guide delves deeply into the intricacies of SQL Server. From its foundational architecture to intricate subjects such as performance tuning, transaction management, and automation with PowerShell, the book provides a thorough exploration of advanced database strategies. Through insightful discussions, practical examples, and real-world applications, readers will develop the skills necessary to expertly navigate the complexities of SQL Server. Whether you aspire to enhance your database design, perfect your T-SQL queries, implement cutting-edge indexing strategies, or establish resilient backup and recovery processes, this book offers the vital knowledge and techniques to achieve professional mastery. "SQL Server Mastery: Advanced Techniques for Database Optimization and Administration" is more than just a book—it's an essential tool for advancing your career in database management and optimization.