Performance

Esat Erkec
Comparison of the Merge Join vs Hash Match Join

Query Optimization Myths

March 23, 2021 by

In this article, we will talk about two query optimization myths and these myths can be changed according to the characteristics of the queries. Every query can exhibit different behaviors according to data distribution, SQL Server version, database settings, and other tons of parameters therefore the fixed ideas may not help to overcome the query performance issues. In the next part of the article, we will focus on the following most known discourse:

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Esat Erkec
How we can read a query plan

How to read an execution plan with all details

January 28, 2021 by

In this article, we will discuss how to read the SQL Server execution plan (query plan) with all aspects through an example, so we will gain some practical experience that helps to solve query performance issues. Interpreting query plans correctly is the first and major principle to troubleshoot query performance issues. When we try to find an answer to the “why is this query running slow?” question, the best starting point would be to analyze the query plan.

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Esat Erkec
Trivial query plans and contradiction detection

Explore the secrets of SQL Server execution plans

December 10, 2020 by

The SQL Server execution plan (query plan) is a set of instructions that describes which process steps are performed while a query is executed by the database engine. The query plans are generated by the query optimizer and its essential goal is to generate the most efficient (optimum) and economical query plan. Some query plans that are created by the query optimizer contain some interesting characteristics. In this article, we will go into details of these interesting query plans.

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Esat Erkec
Detecting the tempdb database spills with extended events

Explore secrets of the SQL Server tempdb database

October 29, 2020 by

In this article, we will uncover some secrets about the SQL Server tempdb database. Tempdb is a system database and it is used for various internal and user operations. Besides this, the tempdb has many unique characteristics, unlike the other databases. When we take into account all of these features of the tempdb, there is no doubt that it is an essential part of the SQL Server.

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Esat Erkec
Tune SQL Server performance using with help of the wait statistics

Boost SQL Server Performance with Wait Statistics

October 26, 2020 by

In this article, we will explore, how we can increase SQL Server performance with the help of the wait statistics. Wait statistics are one of the most important indicators to identify performance issues in SQL Server. When we want to troubleshoot any performance issue, at first we need to diagnose the problem correctly because correctly diagnosing problems help with half of the solution. Now, let’s learn wait statistics which helps to identify performance issues properly.

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