WARNING: Version 5.5 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
Elasticsearch ships with defaults which are intended to give a good out of the box experience. Full text search, highlighting, aggregations, and indexing should all just work without the user having to change anything.
Once you better understand how you want to use Elasticsearch, however, there are a number of optimizations you can make to improve performance for your use case.
This section provides guidance about which changes should and shouldn’t be made.