SQL Server – Dissect the Internals of sp_spaceused

SQL Server – Dissect the Internals of sp_spaceused
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This article is an effort to dissect the output of the sp_spaceused stored procedure.

Introduction

Understanding the database usage internals and the growth trends play a vital role in the defining the right sizing of the database. sp_spaceused is probably an administrator’s most widely-executed system stored procedure to find the disk space used by a database. This helps get a quick glimpse of the database usage. statistics. sp_spaceused is used to display the number of rows, the data size, index size, amount of used space, unused space by each object, and the unallocated size of the database. Although looking at the values given by sp_spaceused, one shouldn’t think of shrinking the database or data file or log file. Many a time, we are unaware of what we are doing. Many a time, we don’t know what would be the aftereffects of doing such resource intrinsic operations. The output of sp_spaceused tells us a lot about the current performance of the database. The unallocated column and the unused column tell us the free space left at the database and the table levels. Read More