Thanks for the suggestions. I have made some of the modifications suggested specifically changing the insert statement loop and cleaning up my statement handles.

I still wanted/needed to use the intermediate table so that I could take advantage of an index. The target table to update can contain 40K + unindexed records. Trying to use an update statement like update owner.table set field=new value where xyz=123 is extremely slow and would mean that I am doing a full table scan of these very large tables for each update statement.

By using the temporary table I can take advantage of an index on the counter value and scan the table only once. This proves to be much more efficient.

Things seem to be working much better. I ran an update of 15,000 records in a little over a minute (this includes the ftp, load and update). An update of 41,000 still hung on me, but I haven't been able to repeat that.

I appreciate all the help, I think I am good to go.

Regards, Tony

In reply to Re: dbi update statement is very slow by ctaustin
in thread dbi update statement is very slow by ctaustin

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.