# Refresh an index


**GET /{index}/_refresh**

**All methods and paths for this operation:**

<div>
                      <span class="operation-verb post">POST</span>
                      <span class="operation-path">/_refresh</span>
                      </div>
                    <div>
                      <span class="operation-verb get">GET</span>
                      <span class="operation-path">/_refresh</span>
                      </div>
                    <div>
                      <span class="operation-verb post">POST</span>
                      <span class="operation-path">/{index}/_refresh</span>
                      </div>
                    <div>
                      <span class="operation-verb get">GET</span>
                      <span class="operation-path">/{index}/_refresh</span>
                      </div>
                    

A refresh makes recent operations performed on one or more indices available for search.
For data streams, the API runs the refresh operation on the stream’s backing indices.

By default, Elasticsearch periodically refreshes indices every second, but only on indices that have received one search request or more in the last 30 seconds.
You can change this default interval with the `index.refresh_interval` setting.

In Elastic Cloud Serverless, the default refresh interval is 5 seconds across all indices.

Refresh requests are synchronous and do not return a response until the refresh operation completes.

Refreshes are resource-intensive.
To ensure good cluster performance, it's recommended to wait for Elasticsearch's periodic refresh rather than performing an explicit refresh when possible.

If your application workflow indexes documents and then runs a search to retrieve the indexed document, it's recommended to use the index API's `refresh=wait_for` query parameter option.
This option ensures the indexing operation waits for a periodic refresh before running the search.

## Required authorization

* Index privileges: `maintenance`


[More about the refresh parameter](https://www.elastic.co/docs/reference/elasticsearch/rest-apis/refresh-parameter)

## Servers
- http://api.example.com: http://api.example.com ()


## Authentication methods
- Api key auth
- Basic auth
- Bearer auth


## Parameters

### Path parameters
- **index** (string | array[string])
  Comma-separated list of data streams, indices, and aliases used to limit the request.
  Supports wildcards (`*`).
  To target all data streams and indices, omit this parameter or use `*` or `_all`.

### Query parameters
- **allow_no_indices** (boolean)
  A setting that does two separate checks on the index expression.
  If `false`, the request returns an error (1) if any wildcard expression
  (including `_all` and `*`) resolves to zero matching indices or (2) if the
  complete set of resolved indices, aliases or data streams is empty after all
  expressions are evaluated. If `true`, index expressions that resolve to no
  indices are allowed and the request returns an empty result.
- **expand_wildcards** (string | array[string])
  Type of index that wildcard patterns can match.
  If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams.
  Supports comma-separated values, such as `open,hidden`.

  Supported values include:
    - `all`: Match any data stream or index, including hidden ones.
    - `open`: Match open, non-hidden indices. Also matches any non-hidden data stream.
    - `closed`: Match closed, non-hidden indices. Also matches any non-hidden data stream. Data streams cannot be closed.
    - `hidden`: Match hidden data streams and hidden indices. Must be combined with `open`, `closed`, or `both`.
    - `none`: Wildcard expressions are not accepted.

- **ignore_unavailable** (boolean)
  If `false`, the request returns an error if it targets a concrete (non-wildcarded)
  index, alias, or data stream that is missing, closed, or otherwise unavailable.
  If `true`, unavailable concrete targets are silently ignored.


## Responses
### 200


#### Body: application/json (object)
- **_shards** (object)



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