When Page Prefetching Takes a Back Seat – Exploring Trace Flag 652 in SQL Server
Learn how a trace flag affects SQL Server reading from disk and where this might be a useful thing for you to enable.
2025-09-24
2,463 reads
SQL Server internal storage
2025-05-16
621 reads
2025-01-15
1,860 reads
What happens when we drop a column on a SQL Server table? Where's my space?
You have dropped a column and wondering why you haven't recovered any space? Let's take a look.
2024-08-01 (first published: 2024-04-26)
4,761 reads
Identify Tables With Dropped Columns
How easily can we find tables with dropped columns that need cleanup?
2024-06-07
2,507 reads
2024-04-10
454 reads
Understanding CRUD Operations on Tables with B-tree Indexes, Page-splits, and Fragmentation
Introduction Every DML transaction reads the data before it makes any changes. Not only during a SELECT query, but when you run any DML statement, insert, update, or delete, SQL Server first fetches a bunch of pages into the buffer pool locating the desired rows and changes them while synchronously writing to the transaction log […]
2021-05-10
8,308 reads
Understanding CRUD Operations Against Heaps and Forwarding Pointers
In this article, we examine how data changes are made against heaps.
2021-05-03
4,828 reads
Understanding the Internals of a Data Page
In Part 1 of this series, we examine the structure of data pages and how your tables are stored on these pages.
2021-04-13
20,087 reads
2020-06-26
645 reads
Blogs
TempDB Internals – What’s New (SQL Server 2016 to 2022)
By Vinay Thakur
I wrote about TempDB Internals and understand that Tempdb plays very important role on...
AI: Blog a Day – Day 2: Generative AI, Multimodal Systems, and Agent AI
By Vinay Thakur
continuing from Day 1 where we covered the history of AI and GPT family,...
A Wellbeing Day at Redgate
By Steve Jones
It’s a day off for Redgate today. This is our annual wellbeing day, where...
Forums
A Quick Restore
Comments posted to this topic are about the item A Quick Restore
Guarding Against SQL Injection at the Database Layer (SQL Server)
Comments posted to this topic are about the item Guarding Against SQL Injection at...
Ola Hallengren Index Optimize Maintenance can we have data compression = page
I have a quick question on Ola Hallengren Index Optimize Maintenance . Do we...
Question of the Day
A Quick Restore
While doing some testing of an application, I wanted to reset my environment after doing some testing with this code:
USE DNRTest BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak' GO /* Bunch of stuff tested here */RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACEWhat happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance. See possible answers