[role="xpack"]
[[security-api-clear-cache]]
=== Clear Cache API

The Clear Cache API evicts users from the user cache. You can completely clear
the cache or evict specific users.

For example, to evict all users cached by the `file` realm:

[source,js]
--------------------------------------------------
POST _xpack/security/realm/default_file/_clear_cache
--------------------------------------------------
// CONSOLE

To evict selected users, specify the `usernames` parameter:

[source,js]
--------------------------------------------------
POST _xpack/security/realm/default_file/_clear_cache?usernames=rdeniro,alpacino
--------------------------------------------------
// CONSOLE

To clear the caches for multiple realms, specify the realms as a comma-delimited
list:

[source, js]
------------------------------------------------------------
POST _xpack/security/realm/default_file,ldap1/_clear_cache
------------------------------------------------------------
// CONSOLE

For more information, see 
{xpack-ref}/controlling-user-cache.html[Controlling the User Cache].