ALTER CLUSTER

Use the following syntax to alter the settings of an existing cluster.

Syntax

ALTER CLUSTER <cluster_name> SET 
  [ MIN_INSTANCES = <min_instance_count> ]
  [ MAX_INSTANCES = <max_instance_count> ]
  [ ALLOW_MAINTENANCE_ACCESS = { TRUE | FALSE } ]
  [ COMMENT = '<comment' ]
  [ INSTANCE_TYPE_FAMILY = '<instance_type_family>' ]
  [ ON_DEMAND_INSTANCES = <on_demand_instance_count> ]
  [ MAX_REPLAY_INSTANCES = <max_replay_instance_count> ]
  [ SCALING_STRATEGY = { 
      LOW_COST | LOW_LATENCY | CONSISTENT_LOW_LATENCY | NO_SCALING } ]
  [ STATIC_PUBLIC_IPS = <number_of_static_ips> ]

Example

ALTER CLUSTER "My test cluster"
    SET MAX_INSTANCES = 4
    SET COMMENT = 'Test cluster'
    SET SCALING_STRATEGY = LOW_COST;