Hi Luke,
luke devon wrote:
I wanted to delete some unwanted data in one of my oracle
database.20 000 of records are there. This is actually on production .
manually to delete a record , it takes 2 mins of time.
So now i decided to write a perl script to do this function
by learning on the web. Can somebody give me a exact guide to delete
that amount of data , without giving any impact for performance of the
database and i would like to ask what is the better way to do such a
execution ?
Do we have to implement more threads ?
Perhaps I'm misunderstanding the problem, but if you would like to remove 20,000
records in an Oracle database, I don't believe that Perl will help you with
that. It seems that you're already doing everything in a single SQL statement;
having Perl do it won't give you much added benefit (i.e., no matter how you
do it, you still have 20,000 records to delete). If these records don't
overlap, then you could consider a multi-threaded approach...I guess.
Another suggestion if this is a production server is to mark records as stale
rather than deleting them (i.e., add a boolean flag as another column). And
then, when the server is least busy, delete the marked records. Or, rather than
a boolean flag, assign some number (say, from 0 to 9) and periodically delete a
portion of the rows...sort of like how log files are handled [delete the oldest
ones].
I presume your problem is that deleting 20,000 in one go is slowing down the
Oracle server?
Ray
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