RE: I/O and db_file_multiblock_read

From: Kevin Closson <kevinc_at_polyserve.com>
Date: Sun, 10 Dec 2006 17:49:45 -0800
Message-ID: <5D2570CAFC98974F9B6A759D1C74BAD001C33766@ex2.ms.polyserve.com>

You folks are freaking me out. The OP could easily be handled by testing with a scan "agent" that doesn't vary its I/O profile. I said so straight out of the
gate and Mark said so with very rich supporting text. Let's just see what the array head
can deliver to dd(1) since it scans with precisely the same sort of I/O as a scattered
read except (most critical) it is buffered in the data segment of dd(1) instead of
sprayed across buffers in the SGA.

ok, crawling back into the cave to work on the blog

kevinclosson.wordpress.com

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Vlad Sadilovskiy

	Sent: Sunday, December 10, 2006 12:03 PM
	To: Mladen Gogala
	Cc: knecht.stefan_at_gmail.com; Hemant K Chitale; oracle-l
	Subject: Re: I/O and db_file_multiblock_read_count
	
	
	And what did I say that was different from your first sentence?

Second sentence I think is wrong. I'll deliberately use explicit tag for parameter and system statistics MBRC value to reduce possible misinterpretation.

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Received on Sun Dec 10 2006 - 19:49:45 CST

RE: I/O and db_file_multiblock_read_count