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Home -> Community -> Usenet -> c.d.o.server -> Re: q: buffer busy wait(data block wait) when P3=130
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.
-- Jonathan Lewis http://www.jlcomp.demon.co.uk Now running 3-day intensive seminars http://www.jlcomp.demon.co.uk/seminar.html Host to The Co-Operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html Author of: Practical Oracle 8i: Building Efficient Databases Ted Chyn wrote in message <44a19320.0202040748.410e1409_at_posting.google.com>...Received on Tue Feb 05 2002 - 15:28:09 CST
>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
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