[jira] [Created] (LUCENE-10509) Performance degraded after 8.8.2 to 8.9.0

["Rajesh T (Jira)" <ji...@apache.org>]

Rajesh T created LUCENE-10509:
---------------------------------

             Summary: Performance degraded after 8.8.2 to 8.9.0
                 Key: LUCENE-10509
                 URL: https://issues.apache.org/jira/browse/LUCENE-10509
             Project: Lucene - Core
          Issue Type: Bug
    Affects Versions: 8.8.2
            Reporter: Rajesh T


We are planning to upgrade from elasticsearch 7.7.1 to opensearch 1.1.0 (with lucene version 8.9.0). We have noticed that the performance of opensearch 1.1.0 is worse than elasticsearch 7.7.1 due to lucene 8.9.0 version. Whereas performance of opensearch 1.0.1 (with lucene version 8.8.2) is almost same as elasticsearch 7.7.1 version.

We have tested following scenarios and observed the slowness is caused by lucene 8.9.0 version.

Elasticsearch 7.7.1 version (with lucene-core 8.5.1) : Fast

OpenSearch 1.0.1 version (with lucene-core 8.8.2) : Fast

OpenSearch 1.1.0 version (with lucene-core 8.9.0) : Slow

OpenSearch 1.1.0 version (with lucene-core 8.8.2) : Fast

This is the snippet of openseach code which is running slow with lucene 8.9.0
{code:java}
QueryBuilder qb = QueryBuilders.boolQuery().mustNot(QueryBuilders.termQuery("__id.keyword", randomValue));
CardinalityAggregationBuilder agg = AggregationBuilders
        .cardinality("somename")
        .field("__id.keyword");
return client.prepareSearch(index).setQuery(qb).addAggregation(agg);
 {code}
Please let us know if this is something that can be fixed.



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