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RE: Using the /*+ append */ insert hint

From: Grant Allen <grant_at_towersoft.co.uk>
Date: Mon, 17 Mar 2003 06:58:41 -0800
Message-ID: <F001.0056B9D7.20030317065841@fatcity.com>


> -----Original Message-----
> From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Toepke,
> Kevin M
> Sent: Monday, March 17, 2003 13:24
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Using the /*+ append */ insert hint
>
>
> >From experience, do not use the APPEND hint for singular
> inserts. You will
> get tons of wasted space. Only use it for bulk inserts such
> as INSERT INTO
> .. SELECT FROM, sqlldr, PL/SQL bulk inserts and the like.
>
> Converting from buld inserts without the append hint to bulk
> inserts with
> the append hint, I've seen as much as a 50% reduction in
> execution time.

That's pretty much what we're targeting. Bulk inserts using insert ... select ... , possibly in the millions of rows. That kind of speed increase would be good.

Ciao
Fuzzy
:-)

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Grant Allen
  INET: grant_at_towersoft.co.uk

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Received on Mon Mar 17 2003 - 08:58:41 CST

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