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Thread: Oracle Instances Crashes daily

  1. #1
    Join Date
    Oct 2001


    I am faced with a problem on our Server which crashes the instance. This just started happening on 1/26/02. It now
    happens once every day during peak/update operations.
    Following is the Error message:

    *** SESSION ID:(3.1) 2001.
    error 471 detected in background process
    OPIRIP: Uncaught error 447. Error stack:

    ORA-00447: fatal error in background process
    ORA-00471: DBWR process terminated with error

    Dump file T:\ORANT\RDBMS73\trace\orclLGWR.TRC
    Wed Jan 30 17:31:43 2002

    *** SESSION ID:(3.1) 2002.
    ORA-00345: redo log write error block 15404 count 2
    ORA-00312: online log 2 thread 1: 'T:\ORANT\DATABASE\LOG3ORCL.DBF'
    ORA-09205: sfqio: error reading or writing to disk
    OSD-04016: Error queuing an asynchronous I/O request.
    O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.
    ORA-00346: log member marked as STALE
    ORA-00312: online log 2 thread 1: 'T:\ORANT\DATABASE\LOG3ORCL.DBF'

    Our server is on Oracle 7.3.4 and Windows 2000 Server. I have looked up both error messages for explanation.
    but since there is also an operating system error code (OSD-0416) with the Oracle error, I cannot find the
    specifics (or other messages in our Trace files) that explains why this happened?

    Is there somewhere or something specific I can look for that causes this problem? How do I fix/correct the problem? Help! Thanks.

  2. #2
    Join Date
    Feb 2000
    NJ, United States
    Check if any backup software is locking this file at certain times which leads to the LGWR process terminating as the file is locked/ not available to write to the file.

    You can find out oS error by typing:
    net helpmsg from the command prompt for OS errors.

    Hope this helps

  3. #3
    Join Date
    Oct 2001
    We are using backup.exe which runs at 3 am. These crashes happen around 3-5 pm. Net helpmsg did not help me. Thanks KN for responding.

  4. #4
    Join Date
    Nov 2000
    Pittsburgh, PA
    Are you running any virus checking at 3 PM.

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