Category: Storage Wednesday

• The sys.dm_db_database_page_allocations DMF

  

  2014-07-09 - General, Series, SQL Server 2012, SQL Server Internals, Storage Wednesday

  Are you looking for an alternative to DBCC IND? Read on to see how the new sys.dm_db_database_page_allocations DMF can be used to return all pages for a particular table (or even all tables in a database).

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• Intermediate Index Pages in SQL Server

  

  2014-07-02 - General, Series, SQL Server Internals, Storage Wednesday

  SQL Server stores indexes in B+ Tree format on disk. Each node is represented by a SQL Server page. The actual rows are stored in data pages while the index structure resides in intermediate index pages. Read on to find out more.

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• Where are my Rows? – Using the %%physloc%% Virtual Column

  

  2014-06-25 - DMVs & CVs, General, Series, SQL Server Internals, Storage Wednesday

  Sometimes it is helpful to know on which page exactly SQL Server has stored a particular row. You can use the undocumented %%physloc%% virtual column, together with its supporting functions sys.fn_PhysLocFormatter and sys.fn_PhysLocCracker, to find out.

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• B+Trees – How SQL Server Indexes are Stored on Disk

  

  2014-06-18 - General, Series, SQL Server Internals, Storage Wednesday

  How does SQL Server organize clustered and non-clustered indexes on disk? SQL server uses B+Trees. Read on to find out what B+Trees are and how they are implemented in SQL Server.

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• The Server Configuration Page

  

  2014-06-11 - DMVs & CVs, General, Series, SQL Server Internals, Storage Wednesday

  The Server Configuration Page is the place where SQL Server stores its configuration values (sp_configure). It is of a special page type that is found only once per SQL Server instance. Read on to get all the details.

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