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Re: q: buffer busy wait(data block wait) when P3=130

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Tue, 5 Feb 2002 21:28:09 -0000
Message-ID: <1012944553.3873.1.nnrp-14.9e984b29@news.demon.co.uk>

Didi you have multiple sessions executing the statement multiple times ? I had to use a minimum of 3 sessions running the query about 4 times in a row to make this happen using source$. You may need more sessions and more passes - or may even need to construct a very large table - depending on the size of your db_block_buffer, available memory, and number of CPUs.

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Ted Chyn wrote in message
<44a19320.0202040748.410e1409_at_posting.google.com>...

>kyle, I tried your example
>select count(*) from $source and the wait in trace file were
>'db file sequential read' other than 'buffer block wait' ?
>
>thnx
>ted
Received on Tue Feb 05 2002 - 15:28:09 CST

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