Re: Fwd: AIX Concurrent I/O for Oracle archive logs

From: Rich Jesse <>
Date: Tue, 25 May 2010 16:17:58 -0500 (CDT)
Message-ID: <>

> From: David Roberts <>
> With the appearance of Advanced format hard drives, Oracle has indicated
> that they want to know the underlying disk physical file format for ASM file
> systems and redo logs.

However, the OP's asking specifically about *archived* redos. If SETALL is used, redo log files are automagially attempted to be opened CIO on AIX. At least on my 5.3 system they are as shown the "lsof +fg" command the Brandon posted.

My current redo generation and RMAN backup patterns don't generally give me enough of a window to verify this for archived redos however, nor FRA files for that matter. And as the oracle account here doesn't have access to /dev/mem nor /dev/kmem and I don't have access to root, I'm afraid I'm not going to be of much more help.

Perhaps a shell script looping the lsof running in a semi-tight loop (with a 1-second sleep perhaps?) while generating excess redo would show something fun?


Received on Tue May 25 2010 - 16:17:58 CDT

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