mirror of https://github.com/apache/druid.git
274ccbfd85
Buffer aggregators can contain some cached objects within them, such as Memory references or HLL Unions. Prior to this patch, various Grouper implementations were not releasing this state when resetting their own internal state, which could lead to excessive memory use. This patch renames AggregatorAdapater#close to "reset", and updates Grouper implementations to call this reset method whenever they reset their internal state. The base method on BufferAggregator and VectorAggregator remains named "close", for compatibility with existing extensions, but the contract is adjusted to say that the aggregator may be reused after the method is called. All existing implementations in core already adhere to this new contract, except for the ArrayOfDoubles build flavors, which are updated in this patch to adhere. Additionally, this patch harmonizes buffer sketch helpers to call their clear method "clear" rather than a mix of "clear" and "close". (Others were already using "clear".) |
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README.md
This module provides Druid aggregators based on https://datasketches.apache.org/.
Credits: This module is a result of feedback and work done by following people.
https://github.com/cheddar https://github.com/himanshug https://github.com/leerho https://github.com/will-lauer