Amazon GameLift Service
API Reference (API Version 2015-10-01)


Rule that controls how a fleet is scaled. Scaling policies are uniquely identified by the combination of name and fleet ID.

Fleet-related operations include:



In the following list, the required parameters are described first.


Comparison operator to use when measuring a metric against the threshold value.

Type: String

Valid Values: GreaterThanOrEqualToThreshold | GreaterThanThreshold | LessThanThreshold | LessThanOrEqualToThreshold

Required: No


Length of time (in minutes) the metric must be at or beyond the threshold before a scaling event is triggered.

Type: Integer

Valid Range: Minimum value of 1.

Required: No


Unique identifier for a fleet that is associated with this scaling policy.

Type: String

Pattern: ^fleet-\S+

Required: No


Name of the Amazon GameLift-defined metric that is used to trigger an adjustment.

  • ActivatingGameSessions -- number of game sessions in the process of being created (game session status = ACTIVATING).

  • ActiveGameSessions -- number of game sessions currently running (game session status = ACTIVE).

  • CurrentPlayerSessions -- number of active or reserved player sessions (player session status = ACTIVE or RESERVED).

  • AvailablePlayerSessions -- number of player session slots currently available in active game sessions across the fleet, calculated by subtracting a game session's current player session count from its maximum player session count. This number does include game sessions that are not currently accepting players (game session PlayerSessionCreationPolicy = DENY_ALL).

  • ActiveInstances -- number of instances currently running a game session.

  • IdleInstances -- number of instances not currently running a game session.

Type: String

Valid Values: ActivatingGameSessions | ActiveGameSessions | ActiveInstances | AvailableGameSessions | AvailablePlayerSessions | CurrentPlayerSessions | IdleInstances | PercentAvailableGameSessions | PercentIdleInstances | QueueDepth | WaitTime

Required: No


Descriptive label that is associated with a scaling policy. Policy names do not need to be unique.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1024.

Required: No


Amount of adjustment to make, based on the scaling adjustment type.

Type: Integer

Required: No


Type of adjustment to make to a fleet's instance count (see FleetCapacity):

  • ChangeInCapacity -- add (or subtract) the scaling adjustment value from the current instance count. Positive values scale up while negative values scale down.

  • ExactCapacity -- set the instance count to the scaling adjustment value.

  • PercentChangeInCapacity -- increase or reduce the current instance count by the scaling adjustment, read as a percentage. Positive values scale up while negative values scale down.

Type: String

Valid Values: ChangeInCapacity | ExactCapacity | PercentChangeInCapacity

Required: No


Current status of the scaling policy. The scaling policy is only in force when in an ACTIVE status.

  • ACTIVE -- The scaling policy is currently in force.

  • UPDATE_REQUESTED -- A request to update the scaling policy has been received.

  • UPDATING -- A change is being made to the scaling policy.

  • DELETE_REQUESTED -- A request to delete the scaling policy has been received.

  • DELETING -- The scaling policy is being deleted.

  • DELETED -- The scaling policy has been deleted.

  • ERROR -- An error occurred in creating the policy. It should be removed and recreated.

Type: String


Required: No


Metric value used to trigger a scaling event.

Type: Double

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

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