Nik Everett 4263c25b2f
Save memory when histogram agg is not on top (backport of #57277) (#57377)
This saves some memory when the `histogram` aggregation is not a top
level aggregation by dropping `asMultiBucketAggregator` in favor of
natively implementing multi-bucket storage in the aggregator. For the
most part this just uses the `LongKeyedBucketOrds` that we built the
first time we did this.
2020-05-29 15:07:37 -04:00
..