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Hello,
In our environment we have SCOM 2012, NetApp package installed and i see a lot of Controller Latency errors. According to SCOM controller latency should be between 5-10ms. I really wonder meaning of "Controller Latency". For example is there any command to view "Controller Latency" in ONTAP?
Thanks.
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ERKANAKSOY has accepted the solution
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After working on this with local NetApp support we found that Controller Latency can be retrieved with the following command in terminal :
stats show system:system:sys_avg_latency
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High latency can be caused by a lot of factors; over utilized disks, CPU, congested network, etc
Though SCOM/MyAutosupport/OCUM could give some information, the best analysis would be to collect stats with the Perfstat tool and let NetApp analyze it
- there are plenty of ONTAP commands to show performance but you have to understand how to interpurt them
- 5 ms latency is not bad. Even for the most sensitive applications
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What I mean is after 2 years of NetApp administration, I never heard controller latency. Of course I know what is LUN latency, Volume latency ... but not controller latency. What is it really?
ERKANAKSOY has accepted the solution
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After working on this with local NetApp support we found that Controller Latency can be retrieved with the following command in terminal :
stats show system:system:sys_avg_latency
