Rajesh T created LUCENE-10509:
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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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