Dennes Torres

Dennes Torres is a Data Platform MVP and Software Architect living in Malta who loves SQL Server and software development and has more than 20 years of experience. Dennes can improve Data Platform Architectures and transform data in knowledge. He moved to Malta after more than 10 years leading devSQL PASS Chapter in Rio de Janeiro and now is a member of the leadership team of MMDPUG PASS Chapter in Malta organizing meetings, events, and webcasts about SQL Server. He is an MCT, MCSE in Data Platforms and BI, with more titles in software development. He can be found speaking in SQL Saturdays around Europe

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20 April 2015
20 April 2015

Looking for outdated statistics

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Outdated statistics are a major cause of bad query plans in SQL Server’s. Even when we have ‘Auto Update Statistics’ on, this doesn’t solve the problem, because the formula for the number of modifications that triggers the ‘Auto Update Statistics’ is 20% + 500. If your table has 3 million rows you will need to … Read more
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11 February 2015
11 February 2015

Checking the Plan Cache Warnings for a SQL Server Database

How often do you check your query plans during development to see if they contain any warnings? If you're missing them, it means that you're not getting all those hints about missing indexes, join predicates or statistics. Is the query optimiser trying to tell you about implicit conversions? Dennes shows how to view the warnings in plan cache for a particular database using SQL… Read more
26 January 2015
26 January 2015

Centralize Your Database Monitoring Process

SQL Server Data Collector, together with Management Data Warehouse, is a fine and useful component for gathering information centrally about how SQL Server instances are being used, and thereby keeping an eye out for problems. It comes into its own when you have figured out how to configure it to run on maybe hundreds of instances using Central Management Server. Dennes describes how to tame the system so that it scales.… Read more