Elasticsearch 1.36.9 - HNSW visited lists and backup improvements
AI Impact Summary
This release introduces significant improvements to the HNSW visited lists, including a new sparse implementation and optimizations for dequeuing during backups. The addition of on-demand query profiling support further enhances the platform's capabilities. These changes represent a substantial investment in core search performance and scalability, directly impacting query speed and data retrieval efficiency.
Affected Systems
Business Impact
Improved search performance and data retrieval efficiency will reduce query latency and improve the overall user experience.
Models affected
- Date
- 3 Apr 2026
- Change type
- capability
- Severity
- critical