When a SQL Server database is operating smoothly and performing well, there is no need to be particularly aware of the transaction log, beyond ensuring that every database has an appropriate backup regime and restore plan in place. When things go wrong, however, a DBA's reputation depends on a deeper understanding of the transaction log, both what it does, and how it works.
2020-10-28 (first published: 2013-08-14)
104,952 reads
You've just become responsible for a database, only to find that the log file is growing out of control. Why is it happening and what do you do to correct it?
2013-04-30
5,146 reads
Why does the transaction log fill up? There are a variety of reasons, and MVP Gail Shaw walks you through the various things to check.
2012-08-31 (first published: 2011-02-21)
63,596 reads
This article shows how you can read the [RowLog Contents] in the Transaction Log, for Real!
2012-11-09 (first published: 2010-11-22)
32,154 reads
This SP will monitor T-Log space and sends mail to DBA if log space usage is above threshold value
2010-10-05 (first published: 2010-10-03)
3,502 reads
2010-06-01
3,746 reads
2009-12-10
3,989 reads
The Transaction Log provides the means by which either the complete set of tasks of a database transaction are performed or none of them are. It ensures that , via rollback, only valid data is written out to the database, and it allows transactions to be played back to recreate the system state right before a failure. Robert Sheldon explains the various basic tasks involved in managing the transaction log.
2009-11-23
4,186 reads
Many DBAs at some point have had to deal with a full transaction log. Check out these steps for finding the cause to quickly solve the problem.
2009-06-15
4,321 reads
One of the common questions often asked online is how to respond to a full transaction log. New author Krishna Potlakayala brings us a few techniques for dealing with this.
2009-03-18
13,032 reads
By Vinay Thakur
Continuing from Day 4 where we learned Encoder, Decoder, and Attention Mechanism, today we...
By Vinay Thakur
Continuing from Day 3 where we covered LLM models open/closed and their parameters, Today...
By Steve Jones
One of the nice things about Flyway Desktop is that it helps you manage...
I'm fairly certain I know the answer to this from digging into it yesterday,...
Hi Team, I am trying to refresh the Azure Synapse Dedicated pool from production...
hi everyone I am not sure how to write the query that will produce...
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t; See possible answers