Are your aggregates more then 65-85% full? 

From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Jeff Mohler
Sent: Friday, September 13, 2013 3:09 PM
To: Fred Grieco
Cc: Toasters@teaparty.net
Subject: Re: high CP_reads/writes ratio

Wafl free space fragmentation most likely.  Reallocate all volumes in the affected aggregate.  

Do not reallocate the _aggregate_.  

Sent from my iPhone

On Sep 13, 2013, at 1:06 PM, Fred Grieco <fredgrieco@yahoo.com> wrote:

What kinds of things can cause a high CP_reads/writes ratio?  And what can I do about it? 

I have an Oracle system with ASM that doing writes in a 15 minute cycle, and it causes a lot of writes with CP reads.   The oracle ASM luns are basically the only thing on the aggregate.  Disk alignment is fine (which is the first thing I thought of).  I've attached a screenshot of the Oncommand graph for one of the disks in this aggr-- not sure if that will come through.

The filer is a 3220 with 8.1.2 7-mode.  Fibre channel attach, and there are about 20 luns under two volumes.

TIA,

Fred

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