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7 changes: 4 additions & 3 deletions docs/reference/indices/apis/freeze.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,10 @@ Freezes an index.
[[freeze-index-api-desc]]
==== {api-description-title}

A frozen index has almost no overhead on the cluster (except
for maintaining its metadata in memory), and is blocked for write operations.
See <<frozen-indices>> and <<unfreeze-index-api>>.
A frozen index has almost no overhead on the cluster (except for maintaining its
metadata in memory) and is read-only. Read-only indices are blocked for write
operations, such as <<indexing,docs-index_>> or <<indices-forcemerge,force
merges>>. See <<frozen-indices>> and <<unfreeze-index-api>>.

IMPORTANT: Freezing an index will close the index and reopen it within the same
API call. This causes primaries to not be allocated for a short amount of time
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