Calculates, at each timestamp, the nth percentile of values of the input series for each time interval. If grouping is specified, it calculates the specified percentile for each group.
pct(DOUBLE) [by FIELD [, FIELD, ...]]
DOUBLE is floating point number between 0.0 and 100.0, both inclusive.
Return the 95th percentile of all input time series
This query calculates a single time series, where each plotted value is the 99.9th percentile of the
MemoryUsed metric of the input time series for a timeslice.
metric=MemoryUsed | pct(99.9)
Return time series with average metric value in 95th percentile by a field
This query is similar to the previous but it calculates the percentile of the
MemoryUsed metric by a metric field, in this case,
node. The query returns a time series for each node; each plotted point in a time series corresponds to the 99.9th percentile of all of the input time series with that
node value, for a timeslice.
metric=MemoryUsed | pct(99.9) by node