This documentation contains work-in-progress information for future Elastic Stack and Cloud releases. Use the version selector to view supported release docs. It also contains some Elastic Cloud serverless information. Check out our serverless docs for more details.
Frozen indices
editFrozen indices
editOlder versions of Elasticsearch provided the option to reduce the amount of data kept in memory for an index, at the expense of increasing search latency. This was known as freezing the index. Frozen indices are no longer useful due to improvements in heap memory usage.
The freeze index API was removed in 8.0, and the unfreeze index API was removed in 9.0.