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Re: Informatica Bulk Mode behavior

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Thu, 22 Apr 2004 16:35:53 +0100
Message-ID: <006901c4287f$817606d0$7102a8c0@Primary>

First guess - they're using direct load, and still loading one row at a time, so you get one row per block (or worse).

Since you've got the v$sql entry, check
executions against rows processed and see if that gives you a clue.

Second guess - is your tablespaces using auto segment space management: (e.g a
9.2 database with tablespaces created by DBCA with default settings). If so, check a few blocks from each extent - there are a couple of bugs in ASSM that could lead to massive space wastage (like only using 3 blocks per extent before allocating a new extent).

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html

April 2004 Iceland http://www.index.is/oracleday.php June 2004 UK - Optimising Oracle Seminar July 2004 USA West Coast, Optimising Oracle Seminar August 2004 Charlotte NC, Optimising Oracle Seminar September 2004 USA East Coast, Optimising Oracle Seminar September2004 UK - Optimising Oracle Seminar

List,
Is anyone familiar with how Informatica's bulk mode works?

We have a situation where I created a 4GB tablespace for a new and simple
truncate/load operation from Informatica, around 7 million rows estimated
to take up 1.5GB.   

Using bulk mode, which appears to be a direct load (in the SQL cache, the
INSERT statement has a hint that I've never seen before: SYS_DL_CURSOR which
I assume stands for Direct Load), they run out of space in the tablespace after
about 200K rows have been inserted.



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Received on Thu Apr 22 2004 - 11:35:24 CDT

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