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[Question #236634]: Graphing average disk service time value

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From: Ilya Voronin <question236634@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 30 Sep 2013 21:46:05 -0000
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New question #236634 on Graphite:
https://answers.launchpad.net/graphite/+question/236634

I'm curious if there's any way to graph average disk service time from two metrics:
- some.<host>.<disk>.ms_spend_reading (# of milliseconds spent reading)
- some.<host>.<disk>.num_reads (# of reads completed)
(https://www.kernel.org/doc/Documentation/iostats.txt)
I need to calculate a new value:
some.<host>.<disk>.avg_svc_time = some.<host>.<disk>.ms_spend_reading / some.<host>.<disk>.num_reads
Can this be done in Graphite?

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