Compression ratio

[amitavmohanty01 (Amitav Mohanty)]

@DavidTurner

Elasticsearch exposes various metrics, such as the size of an index on disk, in the indices stats API, so you can calculate a compression ratio by dividing this metric by the total size of the documents that have been indexed.

I agree. However, as per another thread, Elasticsearch does not track incoming data volume. So, please suggest how to get the total size of documents that have been indexed.