From: <>
Date: Mon, 22 Feb 2010 12:31:32 -0500
Message-ID: <>

You are correct
The point is that the default value in prev release of ASM was 1M and the presenter is suggesting that the default value (starting point) is better set at 4M rather than 1.


  • Rajendra Pande
    Group Technology Infrastructure Services (GTIS) Distributed Systems & Storage (DSS) - Corporate Center Tel#19422-1415[1-201-352-1415] Mobile+1-201-725 3026 Chat ID re04517

-----Original Message-----

From: John Hallas [] Sent: Monday, February 22, 2010 12:24 PM To: Pande, Rajendra;;
Cc:; Subject: RE: ASM on SAN

I am no storage expert but I would like to throw in a couple of points

Quote "For all 11g ASM/DB users, it best to create a disk group using 4 MB ASM AU size. Metalink Note 810484.1 covers this" - slide 15

If that is the case then why did Oracle provide a range of AU_SIZE in 11G ( 1M, 2M, 4M, 8M, 16M, 32M, 64M)? I do not believe one size fits all as far as au_size is concerned.

Secondly when I raised this with Oracle when we were building a new DW I ended up in a conference call with Bill Bridge the designer of ASM who recommended us to use 8M AU_SIZE.


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-- Received on Mon Feb 22 2010 - 11:31:32 CST

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