Re: Upgrading Grid Infra for Standalone ASM from to

From: Niall Litchfield <>
Date: Thu, 14 Apr 2011 15:28:22 +0100
Message-ID: <>

Not that I'm bored waiting for long running processes to do their stuff or anything...

Anyway I've done a wee bit of research for you and determined the following.

  1. You are not alone - there's at least one thread on with the same issue.
  2. Diskmon is an exadata feature! that on most platforms is disabled in the absence of exadata at least in 11.1
  3. in 11.1 you could make a change to init.cssd to stop the diskmon process starting, you can't on 11.2.
  4. some patches for GI were delivered with a missing diskmon.bin though that seems to be an 11.1 problem.

It's likely therefore that you may be able to disable the diskmon process within CRS. Clearly this is not something I would do without

  1. talking to support given the almost complete lack of documentation for the diskmon background process (3 mentions in 11.2 doc set, none in 11.1 :) )
  2. experimenting carefully on a test system.

On Wed, Apr 13, 2011 at 5:00 PM, Don Seiler <> wrote:

> Wondering if anyone else out there has done upgrades of Grid Infrastructure
> for standalone ASM from to I seem to be encountering a
> new bug every time I do it.
> The latest one results in core dump files being created every 10 minutes
> for no reason. This is bug 10283819, although it's been closed as "not a
> bug". The original poster said that the only workaround he found was to
> remove the old grid home directory (which I'd rather not do until
> I'm well into running on and restart all services. So far in just
> over 5.5 days, I have over 6.5GB of these core dump files in the
> $GRID_HOME/log/<hostname>/diskmon/ directory.
> If anyone else has done such an upgrade, I'd like to know if you see this
> as well. Definitely seems like it's not "not a bug" to me.
> --
> Don Seiler

Niall Litchfield
Oracle DBA

Received on Thu Apr 14 2011 - 09:28:22 CDT

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