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Advanced-Analytics_Post_Aggregation.html
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<h3>Advanced Analytics - Post Aggregation</h3><em>You're already monitoring your maximum CPU utilization per day, however you want to perform analytics on the value returned by Logscape on these per day groupings.</em>
<p>Post Aggregation allows you to use the values returned by one Logscape function, as the input to another, this is achieved by aliasing the result, and then using the '+' notation to access this value. For example</p>
<pre>Agent and cpu | cpu.max(_host,POST) +POST.max(,Max) +POST.min(,Min) +POST.avg(,Avg) chart (c3.area)</pre>
<p>This shows you your CPU utilisation spread. With it, you can see the spread between your minimum and maximum CPU laden machines, with the average as an indicator. On pretty much any environment, you’d expect to see the Max significantly higher than the average – that means a few boxes are straining and the rest are coasting. The larger the gap, the more uneven your workload is spread.</p>
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