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How much memory is each SQL Server database using?

June 25, 2010 by John Sansom 18 Comments

Whilst perusing the forums over at SQL Server Central today I stumbled across an interesting question regarding how to identify how much memory is being used by SQL Server on a per database level.

As you know SQL Server stores database data and index pages in memory in an area know as the Buffer Pool. Using my trusty friend Google, I researched an answer to this question on ServerFault provided by Paul Randal. The solution made use of the SQL Server Dynamic Management View (DMV) sys.dm_os_buffer_descriptors

As you know I’m a big fan of using SQL Server DMV’s and so I wanted to take note of this handy SQL code snippet here in order to share it with you.

SELECT
(CASE WHEN ([is_modified] = 1) THEN 'Dirty' ELSE 'Clean' END) AS 'Page State',
(CASE WHEN ([database_id] = 32767) THEN 'Resource Database' ELSE DB_NAME (database_id) END) AS 'Database Name',
COUNT (*) AS 'Page Count'
FROM sys.dm_os_buffer_descriptors
GROUP BY [database_id], [is_modified]
ORDER BY [database_id], [is_modified];
GO

Filed Under: DMVs, SQLServerCentral Syndication, SQLServerPedia Syndication Tagged With: DMV

About John Sansom

I’m a Microsoft Certified Master(MCM) of SQL Server. I’ve been working with database technology in a variety of flavors for over fifteen years. I absolutely love what I do and genuinely feel privileged to be a part of our tremendous technology community. Got a question about SQL Server or being a DBA? Ask me!

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