liuxiaohui1221 opened a new pull request #10531: URL: https://github.com/apache/druid/pull/10531
<!-- Thanks for trying to help us make Apache Druid be the best it can be! Please fill out as much of the following information as is possible (where relevant, and remove it when irrelevant) to help make the intention and scope of this PR clear in order to ease review. --> Fixes #6743 . When the data source has one or more thetasketch,quantilesDoublesSketch,ingestion task(when maxBytesInMemory not -1) will generate a lot of small files and will trigger off heap OOM when merge this spill files. <!-- Replace XXXX with the id of the issue fixed in this PR. Remove this section if there is no corresponding issue. Don't reference the issue in the title of this pull-request. --> <!-- If you are a committer, follow the PR action item checklist for committers: https://github.com/apache/druid/blob/master/dev/committer-instructions.md#pr-and-issue-action-item-checklist-for-committers. --> ### Description Add a internal Aggregator to fix overestimate `thetaSketch`,`quantilesDoublesSketch`. This is a better way than #10241 on aggregation performance. Open to adjust bytesInMemory does not affect aggregation performance, The following are the aggregation test results: <!-- Describe the goal of this PR, what problem are you fixing. If there is a corresponding issue (referenced above), it's not necessary to repeat the description here, however, you may choose to keep one summary sentence. --> ``` Benchmark (adjustFlag) (maxBytesInMemory) (rollup) (rollupOpportunity) (rowsPerSegment) (schema) Mode Cnt Score Error Units ComplexMetricAdjustStrategyBenchmark.addRows true 20000000000 true low 75000 complex avgt 10 77019.343 ± 4248.190 us/op ComplexMetricAdjustStrategyBenchmark.addRows true 20000000000 true moderate 75000 complex avgt 10 87820.211 ± 7365.937 us/op ComplexMetricAdjustStrategyBenchmark.addRows true 20000000000 true high 75000 complex avgt 10 86945.918 ± 9498.552 us/op ComplexMetricAdjustStrategyBenchmark.addRows false 20000000000 true low 75000 complex avgt 10 75927.136 ± 8089.762 us/op ComplexMetricAdjustStrategyBenchmark.addRows false 20000000000 true moderate 75000 complex avgt 10 87066.440 ± 11407.226 us/op ComplexMetricAdjustStrategyBenchmark.addRows false 20000000000 true high 75000 complex avgt 10 93060.885 ± 9937.165 us/op ``` <!-- Describe your patch: what did you change in code? 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If something hasn't changed since the original discussion, you can omit a detailed discussion of those aspects of the design here, perhaps apart from brief mentioning for the sake of readability of this PR description. --> <!-- Some of the aspects mentioned above may be omitted for simple and small changes. --> <hr> This PR has: - > - [✓ ] been self-reviewed. [ ✓] added or updated version, license, or notice information in [licenses.yaml](https://github.com/apache/druid/blob/master/licenses.yaml) - [ ] added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader. [ ✓] added unit tests or modified existing tests to cover new code paths, ensuring the threshold for [code coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md) is met. - [ ] added integration tests. - [ ] been tested in a test Druid cluster. <!-- Check the items by putting "x" in the brackets for the done things. Not all of these items apply to every PR. Remove the items which are not done or not relevant to the PR. None of the items from the checklist above are strictly necessary, but it would be very helpful if you at least self-review the PR. --> <hr> ##### Key changed/added classes in this PR * `MaxIntermediateSizeAdjustStrategy` * `ThetaSketchSizeAdjustStrategy` * `DoublesSketchSizeAdjustStrategy` * `InternalCountAdjustmentAggregator` * `OnheapIncrementalIndex` * `AggregatorFactory` ...... ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For additional commands, e-mail: commits-h...@druid.apache.org