How to estimate import time?
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Thread: How to estimate import time?

  1. #1
    newbie5 is offline Call me super inquisitive
    Join Date
    Jun 2002
    Posts
    178

    How to estimate import time?

    Is there any way to estimate how long an import might take? I know it depends on many factors. All I got scouring the forums is this query which gives an estimate at a table level not at the dmp file level -

    select substr(sql_text,instr(sql_text,'INTO "'),30) table_name,
    rows_processed,
    round((sysdate-to_date(first_load_time,'yyyy-mm-dd hh24:mi:ss'))*24*60,1) minutes,
    trunc(rows_processed/((sysdate-to_date(first_load_time,'yyyy-mm-dd hh24:mi:ss'))*24*60)) rows_per_min
    from sys.v_$sqlarea
    where sql_text like 'INSERT %INTO "%' and
    command_type = 2 and open_versions > 0;

    Any ideas or did someone has any expertize in this?

  2. #2
    Join Date
    Aug 2002
    Location
    Colorado Springs
    Posts
    5,253
    Extremely difficult to say. Depends on number and type of indexes, tablespace configuration, import options, order of rows, triggers ...
    David Aldridge,
    "The Oracle Sponge"

    Senior Manager, Business Intelligence Development
    XM Satellite Radio
    Washington, DC

    Oracle ACE

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