OpenSearch Project Blog

Your source for OpenSearch updates, community news, and technical insights.

OpenSearch 3.6 release

Introducing OpenSearch 3.6

April 7, 2026
OpenSearch 3.6 delivers agent-powered search and observability. Deploy full-stack monitoring in minutes, automate relevance tuning, and build search apps with AI-guided workflows.

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Performance Technical

Beyond filter rewrite: How doc value skip indexes accelerate aggregations in OpenSearch

March 11, 2026
OpenSearch doc value skip indexes deliver up to 28x faster aggregations on uncorrelated filter and aggregation fields, overcoming key filter rewrite limitations.
Performance Search Vector

Lucene HNSW performance: A deep dive into the OS page cache

February 9, 2026
Optimize Lucene HNSW vector search in OpenSearch with OS page cache and RAM tuning. Achieve CPU-bound performance for semantic search, RAG, and LLM applications globally.