public Bucket getSnapshot() {
        return currentSnapshot.get();
    }
Fetch the latest metric values, aggregated over all threads for the
configured sample history (by default five minutes). The values will be
less than 1 second old, and this method has only a memory barrier as side
effect.

@return the latest five minutes of metrics
container-core/src/main/java/com/yahoo/metrics/simple/MetricReceiver.java