elasticsearch/docs/reference/autoscaling/deciders/fixed-decider.asciidoc

[role="xpack"]
[[autoscaling-fixed-decider]]
=== Fixed decider

experimental[]
[WARNING]
The fixed decider is intended for testing only. Do not use this decider in production.

The `fixed` decider responds with a fixed required capacity. It is not enabled
by default but can be enabled for any policy by explicitly configuring it.

==== Configuration settings

`storage`::
(Optional, <<byte-units,byte value>>)
Required amount of node-level storage. Defaults to `-1` (disabled).

`memory`::
(Optional, <<byte-units,byte value>>)
Required amount of node-level memory. Defaults to `-1` (disabled).

`nodes`::
(Optional, integer)
Number of nodes to use when calculating capacity. Defaults to `1`.

[[autoscaling-fixed-decider-examples]]
==== {api-examples-title}

This example puts an autoscaling policy named `my_autoscaling_policy`, enabling
and configuring the fixed decider.

[source,console]
--------------------------------------------------
PUT /_autoscaling/policy/my_autoscaling_policy
{
  "roles" : [ "data_hot" ],
  "deciders": {
    "fixed": {
      "storage": "1tb",
      "memory": "32gb",
      "nodes": 8
    }
  }
}
--------------------------------------------------
// TEST

The API returns the following result:

[source,console-result]
--------------------------------------------------
{
  "acknowledged": true
}
--------------------------------------------------

//////////////////////////

[source,console]
--------------------------------------------------
DELETE /_autoscaling/policy/my_autoscaling_policy
--------------------------------------------------
// TEST[continued]

//////////////////////////