elasticsearch/docs/reference/indices/clearcache.asciidoc

[[indices-clearcache]]
=== Clear Cache

The clear cache API allows to clear either all caches or specific cached
associated with one or more indices.

[source,console]
--------------------------------------------------
POST /twitter/_cache/clear
--------------------------------------------------
// TEST[setup:twitter]

The API, by default, will clear all caches. Specific caches can be cleaned
explicitly by setting the `query`, `fielddata` or `request` url parameter to `true`.

[source,console]
--------------------------------------------------
POST /twitter/_cache/clear?query=true      <1>
POST /twitter/_cache/clear?request=true    <2>
POST /twitter/_cache/clear?fielddata=true   <3>
--------------------------------------------------
// TEST[continued]

<1> Cleans only the query cache
<2> Cleans only the request cache
<3> Cleans only the fielddata cache

In addition to this, all caches relating to a specific field can also be
cleared by specifying `fields` url parameter with a comma delimited list of
the fields that should be cleared. Note that the provided names must refer to
concrete fields -- objects and field aliases are not supported.

[source,console]
--------------------------------------------------
POST /twitter/_cache/clear?fields=foo,bar   <1>
--------------------------------------------------
// TEST[continued]

<1> Clear the cache for the `foo` an `bar` field

[float]
==== Multi Index

The clear cache API can be applied to more than one index with a single
call, or even on `_all` the indices.

[source,console]
--------------------------------------------------
POST /kimchy,elasticsearch/_cache/clear

POST /_cache/clear
--------------------------------------------------
// TEST[s/^/PUT kimchy\nPUT elasticsearch\n/]