We benchmarked Elasticsearch 8.14–8.18 as part of an upgrade we helped a customer with. We uncovered a hidden performance regression in nested indices and will share how we discovered this, along with the exact steps needed to fix it.
Performance (Demo)
Comparing the Effectiveness of Entity Extraction between NLP and LLMs
In Lucene-based search engines like OpenSearch and Solr, keyword aggregations ignore duplicate values that occur within a multi-valued field. We built an OpenSearch plugin to overcome this limitation.

