dist-stddev
Input Stack:
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⇨ | Output Stack:
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Compute the standard deviation for timers and distribution summaries.
A manual query would look like:
statistic,count,:eq, :sum, statistic,totalOfSquares,:eq, :sum, :mul, statistic,totalTime,:eq, :sum, :dup, :mul, :sub, statistic,count,:eq, :sum, :dup, :mul, :div, :sqrt, nf.cluster,foo,:eq, name,http.req.latency,:eq, :and, :cq
This is much simpler using the :dist-stddev function:
nf.cluster,foo,:eq, name,http.req.latency,:eq, :and, :dist-stddev
| Before | After |
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name,playback.startLatency,:eq | name,playback.startLatency,:eq, :dist-stddev |