Hashvalue In Statspack
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  1. #1
    Join Date
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    Hashvalue In Statspack

    When we run SQL report in statspack it asks for HASH value.

    What is that. ? If we enter nothing, it comes out of SQL prompt after giving error.
    vishal sood
    OCP 8

  2. #2
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    To generate stat report, you need run:
    @?/rdbms/admin/spreport

    When you run this SQL, it should ask the Begin and End Snapshot Ids
    only.

    Did I miss something?

  3. #3
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    and optional report_name

  4. #4
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    and when we run sprepsql.sql then first it asks for start snap and end snap then it asks for hashvalue and then report name.

    I am talking about hashvalue. What is that?
    vishal sood
    OCP 8

  5. #5
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    spreport.sql shouldnt ask for the hash value as this is derived from stats$sql_summary and v$sql_text - are you sure the spreport.sql hasnt been modified by anyone? You could try running it with set verify on to see where the hash_value is being asked for.

    P.S What version are you running?

  6. #6
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    Kindly note I am running SPREPSQL.SQL and while running this it is asking for hashvalue.

    I am using Oracle 9i (9.0.0.)
    vishal sood
    OCP 8

  7. #7
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    From looking at the script, it produces a report on a specific SQL statement. The hash_value is Oracle's way of locating a specific bit of SQL in the shared pool. YOu need to look in stats$sql_summary to identify the hash_value of the SQL statement you want to run the report on.

  8. #8
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    From spdoc.txt:

    sprepsql.sql - Reports on a single hash_value

    Once the instance report has been analyzed, often there are high-load SQL statements which should be examined to determine if they are causing unnecessary load.

    The SQL report sprepsql.sql, displays statistics, the complete SQL
    text and (if level 6 snapshot has been taken), information on any SQL Plan(s) associated with that statement.

    The SQL statement to be reported on is identified by the
    statement's Hash Value (which is a numerical representation of the statement's SQL text). The Hash Value for each statement is
    displayed in the high-load SQL sections of the instance report.

    That is:
    You use spreport.sql to get the instance report. From it you can
    find "Hash Value".

    Hope it helps.

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