In one of the recent projects, I found out that despite putting good indexes and optimizing the query, I could not achieve an optimized performance and I still received an unoptimized response from the SQL Server. On examination, I figured out that the culprit was statistics. The database that I was trying to optimize had auto update of the statistics was disabled. Let us learn about how to Enable Automatic Statistic Update on Database.
Community TechDays at Ahmedabad was a great successful event. In fact, this can be considered the biggest event held in Ahmedabad thus far along with the community. I have posted a detailed report of the same at Community TechDays in Ahmedabad – A Successful Event. After the event, I received many emails requesting the comic slow query I had shown in my presentation.
Earlier I have written two different articles on the subject Remove Bookmark Lookup. This article is as part 3 of the original article. Please read the first two articles here before continuing reading this article.
You can download the poster from Itzik Ben-Gan’s T-SQL Querying page over here.
Earlier this year, I had written article on SQL SERVER – Logical Query Processing Phases – Order of Statement Execution and I had asked one question to readers. I got very good response for this question. Today, I am going to discuss about one of the errata I have made there. I had displayed the Logical Query Processing order, where I had incorrectly listed the last two operations. I have listed the operations as ORDER BY first and TOP afterwards. The fact is that TOP is always executed first and ORDER BY after that.
Is your SQL Server running slow and you want to speed it up without sharing server credentials? In my Comprehensive Database Performance Health Check, we can work together remotely and resolve your biggest performance troublemakers in less than 4 hours.
Once you learn my business secrets, you will fix the majority of problems in the future.
Have you ever opened any PowerPoint deck when you face SQL Server Performance Tuning emergencies? SQL Server Performance Tuning Practical Workshop is my MOST popular training with no PowerPoint presentations and 100% practical demonstrations.
Essentially I share my business secrets to optimize SQL Server performance.
