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    4. p_union_02: ORA-01555: snapshot too old

    p_union_02: ORA-01555: snapshot too old

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    1. Additional Information
    • Article Type: General
    • Product: Aleph
    • Product Version: 16.02

    Description:
    p_union_02 stops with the following error:

    Oracle error: fetch z120
    ORA-01555: snapshot too old: rollback segment number 6 with name "_SYS
    21864 END READING AT 00:23:18

    Resolution:
    Correct the "snapshot too old" problem as described in KB 8192-2519, then re-run p_union_01 and p_union_02.

    Note: it might seem that one could use the "From Document Number" parameter to skip records which have already been processed, but p_union_02 does not process the records strictly sequentially and the following SQL shows that, in fact, record 350150 has not been processed:

    odn01@ALEPH0> select min (z120_rec_key) from z120 where z120_update_flag = 'N';
    **** Hit return to continue ****

    MIN(Z120_
    ---------
    000350150

    This record is less than 10% of the way into the database. Therefore, it is cleaner and better to just start over.

    Additional Information

    faq


    • Article last edited: 10/8/2013
    View article in the Exlibris Knowledge Center
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