Sample Auto-scaling Policy Definition

The configuration included in the autoscale-policy.json file is as follows:

{
  "id": "autoscale-policy-1",
  "loadThresholds": {
    "requestsInFlight": {
      "average": 50
    },
    "memoryConsumption": {
      "average": 70
    },
    "loadAverage": {
      "average": 100
    }
  }
}

Parameter definitions

Autoscale policy definitions

Parameter	Description	Required	Default Value	Example Value
id	Unique ID of the autoscaling policy	Yes	N/A	autoscale-policy-1
loadThresholds	The autoscaling loadthreshold is determined based on the requestsInFlight, memoryConsumption and loadAverage.	Yes	N/A	N/A

loadThresholds

Parameter	Description	Required
requestsInFlight	The number of requests the Load Balancer received, but are yet to be processed.	No - Required only if the deployed cartridge is using a Load Balancer.
memoryConsumption	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. The formula used to calculate this is: `(usedMemory/totalMemory)*100` In the above formula, `usedMemory` refers to the amount of current memory usage and `totalMemory` refers to the total amount of memory available in the instance used.	Yes
loadAverage	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%. 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

requestsInFlight

Parameter	Description	Required	Default Value	Example Value
average	The average number of requests in flight.	No	N/A	50

memoryConsumption

Parameter	Description	Required	Default Value	Example Value
average	The average of the memory usage	Yes	N/A	70

loadAverage

Parameter	Description	Required	Default Value	Example Value
average	The average of the system load over a period of time	Yes	N/A	100