Sort_area_size
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Thread: Sort_area_size

  1. #1
    Join Date
    Apr 2001
    Posts
    257

    Sort_area_size

    Here is an excerpt from Oracle 8i Reference about SORT_AREA_SIZE:

    "Increasing SORT_AREA_SIZE size improves the efficiency of large sorts. Multiple allocations never exist; there is only one memory area of SORT_AREA_SIZE for each user process at any time."

    So does this mean for each user process, there could be a memory area of size SORT_AREA_SIZE that is dedicated to the user process for sorting? If so, if I have 3 user processes doing sorting at the same time, it could potentially use 3*SORT_AREA_SIZE memory?

    What does it mean by "Multiple allocations never exist"? Does it mean each user process can only be allocated once for SORT_AREA_SIZE memory?

    Thanks,

  2. #2
    Join Date
    Feb 2001
    Location
    UAE
    Posts
    304
    Yes you guessed it right. Each session will have its own SORT_AREA_SIZE. SORT_AREA_SIZE is not part of SGA.

    Multiple allocations never exists means one session can have just one set of SORT_AREA_SIZE.
    Agasimani
    OCP(10g/9i/8i/8)

  3. #3
    Join Date
    Feb 2000
    Location
    Singapore
    Posts
    1,758
    Total sort area size will be SORT_AREA_SIZE * no. of users doing sorts concurrently. I remember this was discuus here long ago.
    Sanjay G.
    Oracle Certified Professional 8i, 9i.

    "The degree of normality in a database is inversely proportional to that of its DBA"

  4. #4
    Join Date
    Feb 2000
    Location
    Singapore
    Posts
    1,758
    Sanjay G.
    Oracle Certified Professional 8i, 9i.

    "The degree of normality in a database is inversely proportional to that of its DBA"

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