AuthThe Elastic Stack includes Elastic's core products such as Elasticsearch, Kibana, Logstash, and Beats.AvailabilityGenerally available since 8.7This functionality is generally available and ready for production usage.Unless stated otherwise on the page, this functionality is available when your Elastic Stack is deployed on Elastic Cloud Hosted, Elastic Cloud Enterprise, Elastic Cloud on Kubernetes, and self-managed environments.This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes.
Aggregate a time series (TSDS) index and store pre-computed statistical summaries (min, max, sum, value_count and avg) for each metric field grouped by a configured time interval.
For example, a TSDS index that contains metrics sampled every 10 seconds can be downsampled to an hourly index.
All documents within an hour interval are summarized and stored as a single document in the downsample index.
Note
Only indices in a time series data stream are supported.
Neither field nor document level security can be defined on the source index.
The source index must be read only (index.blocks.write: true).