144    for new_metric in cache.new_metrics:
145      if not state.database.exists(new_metric):
146        if CREATE_BUCKET and not CREATE_BUCKET.drain(1):
147          # If our tokenbucket doesn't have enough tokens available to create a new metric148          # file then we'll just drop the metric on the ground and move on to the next
149          # metric.
150          # XXX This behavior should probably be configurable to not drop metrics