Re: Lob chunk updates

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Fri, 5 Mar 2004 08:12:55 -0000
Message-ID: <006e01c40289$a9d15560$7002a8c0@Primary>

Which version of Oracle ?

Is the HW enqueue for the table, the lob segment, the lobindex, or the tablespace enqueue; does it rotate around all four ?

What's your setting of pctversion - it may need to be reviewed for 50 concurrent
updates - or if you're on version 9, perhaps the FREE_POOLS parameter for the LOB
definition may be more relevant.

How do you update a lob if you've truncated the table ? (or is there an option to truncate a specific lob -- I must read the manuals again).

Regards

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

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Original Message ----- From: "Don Cohoon" <Mail_at_DonCohoon.com> To: <oracle-l_at_freelists.org> Sent: Friday, March 05, 2004 6:13 AM Subject: Lob chunk updates

: Anyone notice this? 50 concurrent updaters for a table's LOB stored
: out-of-line are serialized on the HW enqueue, unless truncated.
:
: Makes a person wonder if a filesystem is not so bad after all..
: --Don
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Received on Fri Mar 05 2004 - 02:09:51 CST