Service Broker Blocking
This post is dedicated to all 10 other DBAs that use Service Broker (you know who you are).
The main reason for this blog post is that I’ve got no...
2024-08-19 (first published: 2024-08-09)
174 reads
StraightforwardSQL
My Toolbox - SSMS
No matter how hard Azure Data Studio (ADS) is pushed by Microsoft, most DBAs still use SQL Server Management Studio (SSMS). In this blog post, I’ll go through my...
2024-08-14 (first published: 2024-08-03)
872 reads
Async stats update causing blocking
I recently encountered an issue where an index rebuild set to wait_at_low_priority ended up blocking an asynchronous statistics update.
This interaction led to a large blocking chain where queries were...
2024-07-03 (first published: 2024-06-16)
95 reads
Are ABORT_AFTER_WAIT's victims logged?
In SQL Server, using the KILL command to terminate a session results in an entry being logged in the error log.
This raises the question: Does the ALTER INDEX REBUILD...
2024-06-05 (first published: 2024-05-18)
209 reads
Extended Events and I (T-SQL Tuesday #166)
Foreword
This month’s invitation is from Grant Fritchey (t|b), aka the Scary DBA, about Extended Events (XEs).
If you look at the Tags section of my blog, you can see that...
2023-10-06 (first published: 2023-09-13)
374 reads
Misleading SSMS Connection
Foreword
The other day I managed to confuse myself. I was looking up some information from an Extended Events (XE) session, but my eyes were playing a trick on me....
2023-01-16
13 reads
Advent of Code 2022
Foreword
Advent of Code is an annual event in which participants solve a series of coding puzzles. It typically begins on December 1 and runs through the end of the...
2022-12-23 (first published: 2022-12-08)
159 reads
Default event_file path for Extended Events
Foreword
Have you ever wondered where the .xel file is saved when you create a new Extended Event session and don’t specify the full path (just the file name)?
Like so:
Well,...
2022-12-14 (first published: 2022-11-30)
177 reads
T-SQL Tuesday #156 - Wrap Up
Foreword
Thank you everyone for participating! There is a total of 15 submissions and thanks to them, I’ve widened my perspective.
The order of the posts is chosen at random.
Greg Moore
Contribution|Blog|Twitter
Greg...
2022-11-17
14 reads
Testing the code (T-SQL Tuesday #156)
Foreword
Even though I picked the question, I struggled to answer it.
Following my train of thought - production code should be of the highest quality. To enforce quality, we use...
2022-11-23 (first published: 2022-11-08)
269 reads
Blogs
Why Optimize CPU for RDS SQL Server is a game changer
One feature that I have been waiting for years! The new announcement around optimize...
Performance tuning KubeVirt for SQL Server
Following on from my last post about Getting Started With KubeVirt & SQL Server,...
T-SQL Tuesday #193 – A Note to Your Past, and a Warning from Your Future
By DesertDBA
I haven’t posted in a while (well, not here at least since I’ve been...
Forums
Refactoring SQL Code
Comments posted to this topic are about the item Refactoring SQL Code, which is...
The Read Committed Snapshot Isolation behaviour
Comments posted to this topic are about the item The Read Committed Snapshot Isolation...
Working with JSON/JSONB Data in PostgreSQL using Python
Comments posted to this topic are about the item Working with JSON/JSONB Data in...
Question of the Day
The Read Committed Snapshot Isolation behaviour
I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON:
use master; go alter database AdventureWorks set read_committed_snapshot on with no_wait; goThen, from Session 1, I execute the following code:
--Session 1 use AdventureWorks; go create table ##t1 (id int, f1 varchar(10)); go insert into ##t1 values (1, 'A');From another session, called Session 2, I open a transaction and execute the following update:
--Session 2 use AdventureWorks; go begin tran; update ##t1 set f1 = 'B' where id = 1;Now, going back to Session 1, what happens if I execute this statement?
--Session 1 select f1 from ##t1 where id = 1;See possible answers