What is the value of p1 in parallel query wait event?
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Thread: What is the value of p1 in parallel query wait event?

  1. #1
    newbie5 is offline Call me super inquisitive
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    What is the value of p1 in parallel query wait event?

    A trace file from a parallel query indicates a wait event on a write to file# 1509. But there is no datafile or tempfile with that number. What is this p1 and where is it coming from?

    WAIT #1: nam='direct path write' ela= 107 p1=1509 p2=368263 p3=127

    WAIT #1: nam='direct path write' ela= 109 p1=1509 p2=192517 p3=127

    WAIT #1: nam='direct path write' ela= 135 p1=1509 p2=480649 p3=127

    WAIT #1: nam='direct path write' ela= 110 p1=1509 p2=480776 p3=127

    WAIT #1: nam='direct path write' ela= 116 p1=1509 p2=480903 p3=127

    WAIT #1: nam='direct path write' ela= 123 p1=1509 p2=481030 p3=127

  2. #2
    Join Date
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    p1 = 1509 is the temporary tablespace data file.

    1509 = (value in db_files parameter in init.ora)+abs.file_number from v$tempfile.

    What is the current value you set for db_files?

    Example:
    show parameter db_files

    NAME TYPE VALUE
    -------------------- ----------- ------------------------------
    db_files integer 900

    grep "direct path write" test_ora_1405102.trc
    WAIT #1: nam='direct path write' ela= 2236 p1=901 p2=98628 p3=10
    WAIT #1: nam='direct path write' ela= 2 p1=901 p2=98638 p3=2

    Tamil
    Last edited by tamilselvan; 12-08-2005 at 01:53 PM.

  3. #3
    newbie5 is offline Call me super inquisitive
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    Thanks Tamil.

    db_files is set to 1500 and temp tablespace has 10 temp files and it is trying to write to file number 9.

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