unique and mixed Extent

  • what is unique extent, and mixed extent?

  • Uniform extent: Its 8 pages are reserved and used by only one object
    Mixed extent: Its pages are shared by multiple objects (data, indexes). The maximum number of objects that can use one extent is eight.

    Igor Micev,My blog: www.igormicev.com

  • There is no such Unique extent !

    Extents are logical units for data storage in database. They are combination of 8 data pages i.e. 64 KB.
    Extents can be of two types UNIFORM and MIXED.
    Uniform Extent - These types of extenct are dedicated to hold data pages  for only one type of objects.
    Mixed extent - These type of extent can hold different  type of data pages like Index, System , Data pages etc.

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    Aditya Rathour
    SQL DBA

    Not Everything that is faced can be changed,
    but nothing can be changed until it is faced.

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