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Advanced SQL Server Page Forensics: Detecting Page Splits and Allocations with DBCC PAGE

Page splits are an often-overlooked performance killer in SQL Server. In this article, we take a forensic look at how serial inserts differ from mid-table inserts, revealing why inserting rows out of order causes hidden page splits, increased IO, and fragmentation. Using a wide-column table, we demonstrate both scenarios and decode their impact with page-level analysis.

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2025-09-02 (first published: )

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Question of the Day

Getting the Object Code

What happens when I run this on SQL Server 2022 in the AdventureWorks2022 database?

SELECT OBJECT_DEFINITION (OBJECT_ID(N'dbo.uspGetBillofMaterials')) AS [Object Definition]; 
GO 

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