Re: ** can two processes use the same rollback extent

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Wed, 03 Dec 2003 00:29:25 -0800
Message-ID: <F001.005D873F.20031203002925@fatcity.com>

A single block can only be 'owned' by one transaction at a time, but when a transaction commits, it may put its last undo block into that segment's 'free pool' list if there is a lot of free space left in the block so that it can be made available for new transactions . (Gaja Vaidyanatha quoted 400 bytes as the limit).

Regards

Jonathan Lewis
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Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, December 03, 2003 3:59 AM

i can answer the first part of your question.. YES, two transactions can write on the same extent of an RBS, i think the restriction is at the block level,
this was true until 8i, might have changed in 9 +

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Author: Jonathan Lewis
INET: jonathan_at_jlcomp.demon.co.uk

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