ormance" id="id-zdCxSGFQCy"></a><a data-type="indexterm" data-primary="performance" data-secondary="monitoring" id="id-yYCyFpFdCr"></a>When building a monitoring system from scratch, it’s tempting to design a system based upon the mean of some quantity: the mean latency, the mean CPU usage of your nodes, or the mean fullness of your databases. The danger presented by the latter two cases is obvious: CPUs and databases can easily be utilized in a very imbalanced way. The same holds for latency. If you run 