We request that the 95th percentile be provided as a standard metric for all systems.
We have created custom metrics for the 95th Percentile. We use this metric in our forecasting of systems for applications.
We believe that the average value is too low and that the maximum value is too high, usually due to adhoc events.
As this is currently a custom metric it is quite difficult and unwieldy to amend models to contain this custom statistic.
Also models must contain a base statistic even if it is not required.
The other impact that having this as a custom metric is that the "sys_data_cust_stats" table gets quite large and then impacts on the performance of models and data marts.