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Denys Reznyk

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NoSQL versus SQL PanelHighload fwdays'202020-10-13
A debate between engineers from Moneyveo and Teamwork Commerce moderated by Intapp's Denis Reznik comparing NoSQL and SQL databases. They discuss definitions…
Talk in Russian on
When SQL Server Best Practices Don’t Work.NET Fest 20192019-10-25
Covers SQL Server best practices and shows concrete cases where following common recommendations blindly harms performance. Examines specific SQL Server…
Talk in Russian on
Why Is My Query Slow and How to Fix It.NET Fest 20182018-10-29
Explains why a database query is slow by dividing causes into two categories: high CPU time (the query itself is expensive) or wait time (the query is blocked…
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SQL Server Query Execution: Expectation vs Reality.NET Fest 20172017-10-28
Covers surprising differences between expected and actual SQL Server query execution behavior (like slower execution after changing options, queries never…
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My Database Can't Handle the Load. What to Do?Highload fwdays'172017-10-14
The talk examines causes and remedies when a database cannot handle high load, focusing on practical techniques like query optimization, indexing, sharding…
Talk in Russian on
Why Should I Know SQL and Databases When I Have an ORM?.NET fwdays'172017-03-25
Explains why developers using ORMs still need to understand SQL and databases. Covers limitations of ORMs, performance issues, query optimization, and when to…
Talk in Russian on
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