In my experience 87% is likely to cause some write issues. Even if the volumes are ok the aggregate is short enough on space it's going to spend time looking for somewhere to stick incoming data.
On 09/13/2013 03:16 PM, Fred Grieco wrote:
The prod one is 87%. The replication one is 71% but it was much higher during disaster recovery testing.
I'll run a reallocate measure on the DR side this weekend and see what comes back.
*From:* Jordan Slingerland Jordan.Slingerland@independenthealth.com *To:* Jeff Mohler speedtoys.racing@gmail.com; Fred Grieco fredgrieco@yahoo.com *Cc:* "Toasters@teaparty.net" Toasters@teaparty.net *Sent:* Friday, September 13, 2013 3:12 PM *Subject:* RE: high CP_reads/writes ratio
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 mailto: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 _______________________________________________ Toasters mailing list Toasters@teaparty.net <mailto:Toasters@teaparty.net> http://www.teaparty.net/mailman/listinfo/toasters
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