Unfreeze index APIedit

Deprecated in 7.14

In 8.0, we removed the ability to freeze an index. In previous versions, freezing an index reduced its memory overhead. However, frozen indices are no longer useful due to recent improvements in heap memory usage. You can use this API to unfreeze indices that were frozen in 7.x. Frozen indices are not related to the frozen data tier.

Unfreezes an index.


POST /<index>/_unfreeze


  • If the Elasticsearch security features are enabled, you must have the manage index privilege for the target index or index alias.


When a frozen index is unfrozen, the index goes through the normal recovery process and becomes writeable again.

Path parametersedit

(Required, string) Identifier for the index.


The following example unfreezes an index:

response = client.indices.unfreeze(
  index: 'my-index-000001'
puts response
POST /my-index-000001/_unfreeze