diff --git a/docs/reference/ilm/policy-definitions.asciidoc b/docs/reference/ilm/policy-definitions.asciidoc index 4cfa8748916..0f2c5f531ab 100644 --- a/docs/reference/ilm/policy-definitions.asciidoc +++ b/docs/reference/ilm/policy-definitions.asciidoc @@ -300,12 +300,17 @@ most a specific number of <>. [options="header"] |====== | Name | Required | Default | Description -| `max_num_segments` | yes | - | The number of - segments to merge to. - To fully merge the - index, set it to `1` +| `max_num_segments` | yes | - | The number of segments to merge to. To fully merge the index, set it to `1` +| `codec` | no | - | Optional specification of the `best_compression` codec |====== +[WARNING] +====== +When using the `"codec": "best_compression"` configuration in the ILM forcemerge action, ILM will +<> and then <> the index prior to a forcemerge. +During this time the index will be unavailable for either read or write operations. +====== + [source,console] -------------------------------------------------- PUT _ilm/policy/my_policy