DBCC CHECKDB on Always On databases

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Do we really need to run DBCC checkdb on a database configured with Always On synchronous updates?



I believe the automatic page repair mechanism should identify the corruption and repair it automatically.






sql-server availability-groups dbcc-checkdb







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  • I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
    – scsimon
    51 mins ago

















up vote
2
down vote

favorite












Do we really need to run DBCC checkdb on a database configured with Always On synchronous updates?



I believe the automatic page repair mechanism should identify the corruption and repair it automatically.






sql-server availability-groups dbcc-checkdb







share|improve this question









New contributor




Sankar Raj Chellappan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
    – scsimon
    51 mins ago













up vote
2
down vote

favorite









up vote
2
down vote

favorite











Do we really need to run DBCC checkdb on a database configured with Always On synchronous updates?



I believe the automatic page repair mechanism should identify the corruption and repair it automatically.






sql-server availability-groups dbcc-checkdb







share|improve this question









New contributor




Sankar Raj Chellappan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











Do we really need to run DBCC checkdb on a database configured with Always On synchronous updates?



I believe the automatic page repair mechanism should identify the corruption and repair it automatically.






sql-server availability-groups dbcc-checkdb




sql-server availability-groups dbcc-checkdb






share|improve this question









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Sankar Raj Chellappan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









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edited 1 hour ago









Paul White♦

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Sankar Raj Chellappan

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New contributor





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  • I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
    – scsimon
    51 mins ago

















  • I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
    – scsimon
    51 mins ago
















I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
– scsimon
51 mins ago





I like Brent's Blog on this because he mentions a method one client dodges the performance burden of DBCC but still ensures they are checking both nodes. Also, you can read about this and methods from Aaron
– scsimon
51 mins ago











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Yes you really need to run checkdb on ALL the secondary replicas. If you read MS document on Automatic Page repair it says




Automatic page repair cannot repair the following control page types:



File header page (page ID 0).



Page 9 (the database boot page).



Allocation pages: Global Allocation Map (GAM) pages, Shared Global Allocation Map (SGAM) pages, and Page Free Space (PFS) pages.




So you can see not all types of repairs are fixed by automatic page repair. What if you encounter corruption not coming under error fixed by automatic repair.



If you are using availability groups on WSFC without FCI the storage would be local storage so you need to separately run checkdb and analyze storage for each replica.






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    up vote
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    down vote













    Yes you really need to run checkdb on ALL the secondary replicas. If you read MS document on Automatic Page repair it says




    Automatic page repair cannot repair the following control page types:



    File header page (page ID 0).



    Page 9 (the database boot page).



    Allocation pages: Global Allocation Map (GAM) pages, Shared Global Allocation Map (SGAM) pages, and Page Free Space (PFS) pages.




    So you can see not all types of repairs are fixed by automatic page repair. What if you encounter corruption not coming under error fixed by automatic repair.



    If you are using availability groups on WSFC without FCI the storage would be local storage so you need to separately run checkdb and analyze storage for each replica.






    share|improve this answer
























      up vote
      5
      down vote













      Yes you really need to run checkdb on ALL the secondary replicas. If you read MS document on Automatic Page repair it says




      Automatic page repair cannot repair the following control page types:



      File header page (page ID 0).



      Page 9 (the database boot page).



      Allocation pages: Global Allocation Map (GAM) pages, Shared Global Allocation Map (SGAM) pages, and Page Free Space (PFS) pages.




      So you can see not all types of repairs are fixed by automatic page repair. What if you encounter corruption not coming under error fixed by automatic repair.



      If you are using availability groups on WSFC without FCI the storage would be local storage so you need to separately run checkdb and analyze storage for each replica.






      share|improve this answer






















        up vote
        5
        down vote










        up vote
        5
        down vote









        Yes you really need to run checkdb on ALL the secondary replicas. If you read MS document on Automatic Page repair it says




        Automatic page repair cannot repair the following control page types:



        File header page (page ID 0).



        Page 9 (the database boot page).



        Allocation pages: Global Allocation Map (GAM) pages, Shared Global Allocation Map (SGAM) pages, and Page Free Space (PFS) pages.




        So you can see not all types of repairs are fixed by automatic page repair. What if you encounter corruption not coming under error fixed by automatic repair.



        If you are using availability groups on WSFC without FCI the storage would be local storage so you need to separately run checkdb and analyze storage for each replica.






        share|improve this answer












        Yes you really need to run checkdb on ALL the secondary replicas. If you read MS document on Automatic Page repair it says




        Automatic page repair cannot repair the following control page types:



        File header page (page ID 0).



        Page 9 (the database boot page).



        Allocation pages: Global Allocation Map (GAM) pages, Shared Global Allocation Map (SGAM) pages, and Page Free Space (PFS) pages.




        So you can see not all types of repairs are fixed by automatic page repair. What if you encounter corruption not coming under error fixed by automatic repair.



        If you are using availability groups on WSFC without FCI the storage would be local storage so you need to separately run checkdb and analyze storage for each replica.







        share|improve this answer












        share|improve this answer



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        answered 1 hour ago









        Shanky

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        13.7k32039




















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