Sql server performance tuning and optimization
SQL Server Concepts/Structure
Performance Measuring & Troubleshooting Tools
Locking
Performance Problem : CPU
Performance Problem : Memory
Performance Problem : I/O
Performance Problem : Blocking
Query Tuning
Indexing
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Sql server performance tuning and optimization
1. SQL Server Performance Tuning & Optimization By Manish Rawat http://www.linkedin.com/in/manishra
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8. Transaction Isolation Levels Level Definition Read Un-Committed Donāt need a lock to read a data Read Committed ā Defaultā Read only committed data otherwise wait. Request āSā lock to read. No guarantee that read is repeatable Repeatable read Guarantees that data read in a transaction will not change for it duration. Holds the āSā lock until the duration of transaction. Serializable Prevent phantoms In any of above transaction, an āXā lock acquired is held for total duration of transaction.