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An auto-scaling policy defines the threshold values pertaining to scaling up and scaling down decisions. Autoscaler will refer to the auto-scaling policy that is defined by DevOps. A sample auto-scaling policy definition, together with information on all the properties that can be added in an auto-scaling policy definition JSON are as follows:

Sample auto-scaling policy definition JSON

The following are sample configurations that can be used to define an auto-scaling policy:

{
  "id": "autoscaling-policy-1",
  "loadThresholds": {
    "requestsInFlight": {
      "threshold": 50
    },
    "memoryConsumption": {
      "threshold": 40
    },
    "loadAverage": {
      "threshold": 40
    }
  }
}

Property definitions

All the properties that correspond to the auto-scaling resource are explained as follows: 

Main property definitions

Property		Image Added	Image Added	Image Added	Description	Image Added	Image Added	Data Type	Example
JSON	UI
Anchor id id id	Auto Scale policy ID	√	√		Unique ID of the autoscaling policy	Yes	N/A	String	economy
Anchor displayName displayName displayName		√	√			No	N/A	String
Anchor description description description	Description	√	√		A summarized description of the auto-scaling policy	No	N/A	String	Values for economy auto-scaling policy.
Anchor loadThresholds1 loadThresholds1 loadThresholds	Load Thresholds	√	√		The autoscaling load threshold is determined based on the requests in flight, memory consumption, and load average. For more information on the sub-properties, see loadThresholds.	Yes	N/A	LoadThresholds	N/A

Sub-property definitions

loadThresholds

Property		Image Added	Image Added	Image Added	Description	Image Added	Image Added	Data Type
JSON	UI
Anchor requestsInFlight1 requestsInFlight1 requestsInFlight	Requests In Flight	√	√		The number of requests the load balancer received, but are yet to be processed. For more information on the sub-properties, see requestsInFlight. Info This property is only required if the deployed cartridge is using a load balancer.	No	N/A	requestsInFlight
memoryConsumption	Memory Consumption	√	√		The memory usage of a cartridge process, which is considered as a percentage of the total available RAM. This is a percentage and cannot go beyond 100, since a process cannot take more than total physical memory. For more information on the sub-properties, see memoryConsumption. Info The formula used to calculate this is: ((usedMemory - cachedMemory)/totalMemory)*100 In the above formula, usedMemory refers to the amount of current memory usage, cachedMemory refers to the amount of memory available in the Cache and totalMemory refers to the total amount of memory available in the instance used.	Yes	N/A	memoryConsumption
loadAverage	Load Average	√	√		The average system load over a period of time. (System load is a measure of the amount of computational work that a computer system performs.) This a percentage and it can go beyond 100%. For more information on the sub-properties, see loadAverage. Info The formula used to calculate this is: (loadAvg/cores)*100 In the above formula, loadAvg refers to the load average of the instance and cores refers to the number of CPU cores of the instance.	Yes	N/A	loadAverage

requestsInFlight

Property		Image Added	Image Added	Image Added	Description	Image Added	Image Added	Data Type	Example
JSON	UI
Anchor threshold1 threshold1 threshold	Threshold	√	√		The maximum requests in-flight limit.	No	N/A	Float	30

memoryConsumption

Property		Image Added	Image Added	Image Added	Description	Image Added	Image Added	Data type	Example
JSON	UI
Anchor threshold2 threshold2 threshold	Threshold	√	√		The maximum memory usage limit.	No	N/A	Float	80

loadAverage

Property		Image Added	Image Added	Image Added	Description	Image Added	Image Added	Data Type	Example
JSON	UI
Anchor threshold3 threshold3 threshold	Threshold	√	√		The maximum limit of an average system load over a period of time.	Yes	N/A	Float	100