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  1. ZABBIX FEATURE REQUESTS
  2. ZBXNEXT-5496

Aggregate checks "median" function: grpmed (maybe grpstdev too)

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    Details

    • Type: New Feature Request
    • Status: Open
    • Priority: Trivial
    • Resolution: Unresolved
    • Affects Version/s: 4.4.0
    • Fix Version/s: None
    • Component/s: Server (S)
    • Environment:
      software platform

      Description

      There's a pretty nice set of aggregate check statistical functions - the basics of min/avg/max/last are covered, but one that would be helpful is median.

      The value of median aggregate is that it tends to be resistant to bizarre/false readings. Say you're reporting the average drive temperature from a collection of 36 drives and a few have faulty sensors that always report "0" or -65,535 or + 65,535, that can really thrown the existing aggregate functions way off - while median wouldn't change much and would be a much more accurate number to base AC, airflow, etc. decisions on.

      There is also statistical value in having having a grpstdev function.  For example evaluating grpstdev for ping time would have statistical significance for subnet/branch issues that grpmax wouldn't (single messed up device) and grpavg/grpmed might also not show as clearly.   I see this as less clearly helpful as grpmed (proposed group median aggregate function) but still useful if someone is already messing around with the aggregate function code.

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            Assignee:
            wiper Andris Zeila
            Reporter:
            gessel David Gessel
            Votes:
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              Dates

              Created:
              Updated: