DBCC CHECKDB performance

  • I have a server and two instance SQL SERVER 2008 R2 SP2

    and SQL SERVER 2012 and firstly ı try DBCC CHECKDB in SQL SERVER

    2008 R2 2 times and it takes 5 hours and 30 minutes after

    I deattched db and ı atched db to SQL SERVER 2012 and

    ı try DBCC CHECKDB in SQL SERVER 2012 and it takes

    2 hours and 28 minutes what is the new feature of SQL SERVER 2012

  • Are the RAM, temp db and disk configurations same?

  • test make in the same server only instances are diffrent

  • Do both instances of SQL Server have the same memory allocation?

    In SSMS

    - Right-click on the server name and select 'Properties'

    - Select the 'Memory' option.

    - There is a 'Maximum server memory (in MB) section.

  • It is true i didnt look at that

  • Hi,

    Did you manage to check the SQL Server max memory parameter in both instances?

    Were they different?

    If so, were you able to make the parameters the same and re-test?

  • It is due to the page and object batching improvements that came into SQL Server 2012.

    Although there was a CU in 2008 R2

    Bob ward explains the story here

    http://blogs.msdn.com/b/psssql/archive/2012/02/23/a-faster-checkdb-part-ii.aspx

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