If you're running the latest version, some of that info is on the Index Activity dashboard, and you can use that search as a start.
Change out the calc for measuring max, min, avg, etc
EG:
timechart avg(kbps) by series
timechart max(kbps) by series
kbps by sourcetype: index="_internal" source=*metrics.log group="per_sourcetype_thruput" | timechart avg(kbps) by series
eps by sourcetype: index="_internal" source=*metrics.log group="per_sourcetype_thruput" | timechart avg(eps) by series
If you wanted host or source, use group="per_source_thruput" or group="per_host_thruput" instead.
ah, one more suggestion... If you don't want to chart the results in a timeseries, you can swap out the timechart command with the stats command which may be a better fit for the solution you are looking for:
EG:
index="_internal" source=*metrics.log group="per_sourcetype_thruput" | stats avg(eps) by series
... View more