Database Administrator (DBA)

Responsibilities

• SQL Server Internals
• Deep understanding of SQL Server query processing, memory management, and I/O handling.
• Familiarity with execution plans, query processor architecture, and storage engine behavior.
• Query Optimization
• Expertise in indexing strategies, including clustered, non-clustered, filtered, and columnstore indexes.
• Knowledge of INCLUDE columns and their impact on query performance.
• Statistics and Cardinality Estimation
• Understanding of SQL Server's use of statistics for query planning.
• Experience with updating, creating, and managing statistics to improve estimator accuracy.
• Concurrency and Locking
• Proficiency in diagnosing blocking, deadlocks, and transaction isolation levels.
• Ability to tune workloads for high concurrency without sacrificing performance.
• Experience in dealing with SQL Server version changes, particularly related to query performance.
• Experience with AlwaysON and other replication technologies.