Storage NetApp Sysstat values


These two values are my diag results. You can see any is between 99-100% but averages are much less. This happens all the time but doesn't remain constant so I'm not sure if it's an issue. WAFL_Ex is over 100% as well. How would I drill down to find the culprit of some of these high numbers. The CPU is normally 10-30% most of the time. Is there a TR document or blog that describes the breakdown of these values?

100%    75%      47%      25%     13%      6%       2%        1%       34%  35%   35%    34%   35%    34%   33%    34%  34%    


Network Protocol Cluster Storage Raid Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt Intr Host
   34%        0%         0%      34%     27%     6%    11%       112%( 89%)               0%                3%          0%      39% 5%   3%
Ops/s   CP
   825    6%
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Paul SolovyovskySenior IT AdvisorCommented:
What version of Ontap are you using?  Prior to Ontap 8.1.2P4 the Kahuna process was single threaded and caused many chokepoints with WAFL.  You should review your consistancy points (CPs), especially for back to back CPs which tell the system to hold until it can process the data it can't keep up with.
snyderkvAuthor Commented:
We are using 8.1.2 and I think I saw an article on Block reclamation scanners causing kahuna bottleneck Bug ID 210480 but not sure if that is the issue here. I didn't want to do a major upgrade on a production system if it wasn't going to fix the issue. Anyways, if it happens again, I will look at upgrading. Thanks
snyderkvAuthor Commented:
Oh my Kahuna 11% and WAFL_ex (89) both = 100% which is part of the bug according to

I'll keep a closer eye on it and suggest an upgrade if necessary.
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Paul SolovyovskySenior IT AdvisorCommented:
Take a look at your CPs, it's usually a better indicator of what is going on.  Are you having performance issues or this is just for FYI?

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snyderkvAuthor Commented:
Thanks I book marked that page and will use it for future reference. I didn't experience performance issues but I do hear constant alarms from upper management whenever the CPU does this so I'm just drilling down slowly since it will happen again.
Paul SolovyovskySenior IT AdvisorCommented:
CPU spikes are normal as there is always things in the background (snapmirror, snapshots, etc..).  As long as it doesn't impact performance it is ok but it should go down.  If you see it pegged than this is something to be concerned about.
snyderkvAuthor Commented:
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