nfs_write_latency, how high is high

dragontiger
‎2015-06-30 07:53 PM
5,012 Views

statistics show-periodic -object volume -instance volume_name -counter nfs_write_latency

 

I am running this command on volumes, and got different values, from 0 us to a few hundreds,

 

How high it is too high, Anybody please let me know your measurement? Thanks!

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deepuj
NetApp Alumni
‎2015-07-01 12:36 AM
4,974 Views

Hi,

 

How high is too high: this depends on the application hosted on the particular nfs volume, and how much load is there from other volume on the controller.

In your case, I see sub milli second write latency which is fairly good for NFS volumes.Values lesser than 5 ms is ideally good.

 

Thanks

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dragontiger
‎2015-07-01 03:31 AM
In response to deepuj
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Less than 5 ms (millisecond) on a VOLUME is good? are you sure?

 

we have 0 - hundreds us (microsecond), the maximum one is 1400 us, but the performace is terrible.

 

How to explain this?

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deepuj
NetApp Alumni
‎2015-07-01 03:54 AM
In response to dragontiger
4,942 Views

Hi,

 

0 to hundreds of micro seconds (Less than 1 ms) is ideally good, but again, depends on your workload.

 

I would stongly recommend you to open a support ticket to address this issue related to performance.

 

 

Thanks

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