See Note 181272.1 on MetaLink. "The Multiblock I/O never spans Extent Boundaries even if the Extents are continuous and also if using Locally Managed Tablespaces. " Hemant
At 07:44 AM 17-03-03 -0800, you wrote:
How can you tell that DB_FILE_MULTIBLOCK_READ will not span extents? I was unable to confitrm that on Metalink.
> -----Original Message----- > From: Hemant K Chitale [mailto:[EMAIL PROTECTED] > Sent: Monday, March 17, 2003 9:44 AM > To: Multiple recipients of list ORACLE-L > Subject: Re: db file scattered read > > > > If 14706+3 is one extent and another extent begins at 14710, > it will NOT read > 14706+8. A DB_FILE_MULTIBLOCK_READ will not span extents. > Hemant > > At 09:04 AM 14-03-03 -0800, you wrote: > >Here is a part of trace file . I am finding that oracle is > trying to read > >8 or 3 or 7 blocks at a time . But block numbers are all > sequential i.e. > >it will read 3 blocks starting from 14706 and then 8 blocks > starting from > >14710 ( 14706+3 ). Why it doesn't read 8 blcoks always it > multi_block_read > >is set to 8 ? Any Idea . > >Also what is ela=1 ,does it mean elapsed time is 1 sentisec ? > > > > > > > >WAIT #32: nam='db file scattered read' ela= 0 p1=4 p2=14706 p3=3 > >WAIT #32: nam='db file scattered read' ela= 1 p1=4 p2=14710 p3=8 > >WAIT #32: nam='db file scattered read' ela= 2 p1=4 p2=14718 p3=8 > >WAIT #32: nam='db file scattered read' ela= 0 p1=4 p2=14727 p3=3 > >WAIT #32: nam='db file scattered read' ela= 0 p1=4 p2=14731 p3=7 > >WAIT #32: nam='db file scattered read' ela= 1 p1=4 p2=14739 p3=3 > >WAIT #32: nam='db file scattered read' ela= 1 p1=4 p2=14744 p3=8 > >WAIT #32: nam='db file scattered read' ela= 1 p1=4 p2=129784 p3=8 > > > > > >Thanks > >-ak > > Hemant K Chitale > My personal web site is : http://hkchital.tripod.com > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Hemant K Chitale > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Gogala, Mladen INET: [EMAIL PROTECTED]
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Hemant K Chitale My personal web site is : http://hkchital.tripod.com
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: [EMAIL PROTECTED]
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