Elasticsearch 7.9.0, based on Lucene 8.6.0, introduces several enhancements and new features, including improvements to data ingestion, search capabilities, and machine learning functionalities. The release simplifies the ingest process with data streams, allowing efficient handling of time series data across multiple indices, and introduces a flexible memory-based queue to improve ingestion throughput. It also enhances search capabilities with the new wildcard data type and introduces Event Query Language (EQL) for advanced threat detection. The update includes new aggregation functions like variable width histogram and moving percentiles aggregation, along with performance optimizations. Additionally, the release features a Tableau Connector, enabling direct access to Elasticsearch data from Tableau, eliminating the need for ETL processes. These updates are aimed at making Elasticsearch more efficient and versatile for users across various domains, including security and observability.