Whenever you have a really large amount of data to insert into a table, it is much better and faster to use a loading utility that is native to the database server. (In the case of Oracle, this would be a tool called sqlload, or something similar to that -- I don't know the exact spelling of the tool name in Oracle 9i.)

It would be most effective to use a simple Perl script to create the text stream that will serve as input to the native dbms import tool, so that you have a chance to make sure that the input won't involve any really hazardous mistakes -- i.e. errors in the data that the dbms tool might find acceptable even though they are errors.

I haven't done a recent systematic benchmark of Perl/DBI vs. sqlload, but the last time I had occasion to compare the two, doing row inserts via Perl/DBI was orders of magnitude slower than using sqlload.

In reply to Re: processing slows way down by graff
in thread processing slows way down by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.