Elastic 9.5: Columnar, VectorDB index mode & auto-calibration, and AI-driven alert triage

What this post added

Introduced Columnar Mode as an opt-in indexing option for Elasticsearch, storing fields in a column store without an inverted index by default to reduce storage footprints and improve indexing and analytical query performance. Also introduced VectorDB index mode, a simplified configuration for vector search that applies optimized defaults for quantization, merge policy, and cache loading, making vector search easier to set up and performant out of the box.