columns format version: 1 19 columns: `timeseries_name` String `timeseries_key` UInt64 `start_time` DateTime64(9, 'UTC') `timestamp` DateTime64(9, 'UTC') `bins` Array(UInt64) `counts` Array(UInt64) `min` UInt64 `max` UInt64 `sum_of_samples` Int64 `squared_mean` Float64 `p50_marker_heights` Array(Float64) `p50_marker_positions` Array(UInt64) `p50_desired_marker_positions` Array(Float64) `p90_marker_heights` Array(Float64) `p90_marker_positions` Array(UInt64) `p90_desired_marker_positions` Array(Float64) `p99_marker_heights` Array(Float64) `p99_marker_positions` Array(UInt64) `p99_desired_marker_positions` Array(Float64)