WARNING: Version 0.90 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.
The flush API allows to flush one or more indices through an API. The flush process of an index basically frees memory from the index by flushing data to the index storage and clearing the internal transaction log. By default, ElasticSearch uses memory heuristics in order to automatically trigger flush operations as required in order to clear memory.
$ curl -XPOST 'http://localhost:9200/twitter/_flush'
The flush API can be applied to more than one index with a single call,
or even on
_all the indices.
$ curl -XPOST 'http://localhost:9200/kimchy,elasticsearch/_flush' $ curl -XPOST 'http://localhost:9200/_flush'