Make hierarchical k-means over centroids cheaper #132316
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* upstream/main: (822 commits) Improve Semantic Text Exists Query Tests (elastic#132283) Make hierarchical k-means over centroids cheaper (elastic#132316) Remove unnecessary listener.delegateFailure in IndexShard#ensureMutable (elastic#132294) Add missing release note (elastic#132319) Unmute elastic#131803 (elastic#132295) Include bytes for live docs in ShardFieldStats (elastic#132232) Fix default missing index sort value of data_nanos pre 7.14 (elastic#132162) [DiskBBQ] Quantize centroids using 7 bits instead of 4 bits (elastic#132261) Use panamized version for windows in Int7VectorScorer (elastic#132311) Mute org.elasticsearch.xpack.ml.integration.AutodetectMemoryLimitIT testTooManyByAndOverFields elastic#132310 Mute org.elasticsearch.xpack.ml.integration.AutodetectMemoryLimitIT testManyDistinctOverFields elastic#132308 Update 8.17 version to 8.17.10 (elastic#132303) Mute org.elasticsearch.datastreams.DataStreamsClientYamlTestSuiteIT test {p0=data_stream/10_basic/Create hidden data stream with match all template} elastic#132298 Add random queries to logsdb data generation tests (elastic#132109) ES|QL Inference runner refactoring (elastic#131986) Add basic example to linear-retriever.md (elastic#132196) Refactor RemoteClusterService to be multi-project aware (elastic#131894) ESQL: Mark csv-spec tests (elastic#132098) Mute org.elasticsearch.common.logging.JULBridgeTests testThrowable elastic#132280 Bump versions after 8.19.0 release ...
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when adding hierarchical kmeans over centroids, we added very aggressive settings. This makes a noticeable slow down when the number of centroids increases and it provides little benefit. My checks shows no change on recall by changing the settings to the default ones.