Facing the same issue , any resolution found for this. Please let me know.
Thank you On 3/19/25, 4:03 PM, "Wei" <weiwan...@gmail.com <mailto:weiwan...@gmail.com>> wrote: Greetings everyone, After building the Solr HNSW index on 9.8.0, I tried to optimize it to a single segment. However the optimization doesn't happen and no errors found in solr log. Schema: <fieldType name="knn_vector_float_256" class="solr.DenseVectorField" vectorDimension="256" similarityFunction="dot_product" vectorEncoding= "FLOAT32" hnswMaxConnections="16" hnswBeamWidth="200"/> <fieldType name= "knn_vector_byte_256" class="solr.DenseVectorField" vectorDimension="256" similarityFunction="dot_product" vectorEncoding="BYTE" hnswMaxConnections= "16" hnswBeamWidth="200"/> <field name="item_vector_float" type= "knn_vector_float_256" indexed="true" stored="false"/> <field name="item_vector_byte" type="knn_vector_byte_256" indexed="true" stored="false"/> Solrconfig for merge: <mergePolicyFactory class= "${mergePolicyFactory:org.apache.solr.index.TieredMergePolicyFactory}"> <int name="maxMergeAtOnce">25</int> <int name="segmentsPerTier">25</int> < int name="maxMergedSegmentMB">100000</int> </mergePolicyFactory> In total 30M docs are indexed and I trigger optimization with /update?optimize=true&waitSearcher=false&maxSegments=1. When using the BYTE type, optimization finishes successfully. Howeverwith FLOAT32 type it does not work, and ends up with ~33G index in ~80 segments. Also I noticed there isn't any reduction in segment number. The solr node has ~200G memory and plenty of disk space. Thanks, Wei
