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How are VLFs created, truncated and deleted?
Today I chose to talk about Virtual Log Files or VLF in short. VLFs are the physical files that implement the log file. The log file’s...

Madeira Team
Jan 16, 20126 min read


Monitoring Deadlocks
In order to monitor and analyze deadlocks in your server you will first need to understand what does deadlock mean. The Books Online...

Madeira Team
Jan 10, 20124 min read
CASE Study
Sometimes we want to populate a table with random data, mainly for testing purposes. For example, let’s consider the following table:...

Madeira Team
Jan 9, 201210 min read


The table variable transaction catch
As I’ve mentioned in my previous post, there is a catch when using a table variable as a part of a transaction. It behaves differently...

Madeira Team
Jan 8, 20123 min read


LOOP, HASH and MERGE Join Types
Today I’ll talk about the available JOIN operator types in SQL Server (Nested Loops, Hash and Merge Joins), their differences, best...

Madeira Team
Jan 5, 20128 min read


Pro and Cons of Parameter Sniffing
Look at the following 3 scripts: Transact-SQL -- 1. Hardcoded SELECT * FROM Sales.Orders WHERE DateAndTime < '19900101' -- 2. Variable...

Madeira Team
Jan 3, 20123 min read


Staging, temp and variable tables – performance, recompilation and what’s in between
A lot of times, when creating a procedure, we need to use some kind of an empty table in order to perform all kinds of calculations. The...

Madeira Team
Jan 2, 20128 min read
About Snapshots and Ghosts
A few weeks ago Kalen Delaney presented a 3-day seminar in Israel. Unfortunately, I wasn’t able to attend the seminar, but some of our...

Madeira Team
Dec 30, 20115 min read
Monitoring Page Splits
Three months ago, I presented a session at the special Rosh HaShana user group meeting. The session was about Monitoring Page Splits. I...

Madeira Team
Dec 16, 20112 min read


PrintMax
This script creates the “PrintMax” stored procedure, which prints a text of any size. It’s intended to replace the “Print” statement,...

Madeira Team
Dec 11, 20111 min read
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