Adding a scaling policy - Amazon ElastiCache (Redis OSS)
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Adding a scaling policy

You can add a scaling policy using the Amazon Web Services Management Console.

To add an Auto Scaling policy to an ElastiCache (Redis OSS) cluster

  1. Sign in to the Amazon Web Services Management Console and open the Amazon ElastiCache console at https://console.amazonaws.cn/elasticache/.

  2. In the navigation pane, choose Redis OSS.

  3. Choose the cluster that you want to add a policy to (choose the cluster name and not the button to its left).

  4. Choose the Auto Scaling policies tab.

  5. Choose add dynamic scaling.

  6. For Policy name enter a policy name.

  7. For Scalable Dimension choose shards.

  8. For the target metric, choose one of the following:

    • Primary CPU Utilization to create a policy based on the average CPU utilization.

    • Memory to create a policy based on the average database memory.

    • Capacity to create a policy based on average database capacity usage. The Capacity metric includes memory and SSD utilization for data-tiered instances, and memory utilization for all other instance types.

  9. For the target value, choose a value greater than or equal to 35 and less than or equal to 70. Auto scaling will maintain this value for the selected target metric across your ElastiCache shards:

    • Primary CPU Utilization: maintains target value for EngineCPUUtilization metric on primary nodes.

    • Memory: maintains target value for DatabaseMemoryUsageCountedForEvictPercentage metric

    • Capacity maintains target value for DatabaseCapacityUsageCountedForEvictPercentage metric,

    Cluster shards are added or removed to keep the metric close to the specified value.

  10. (Optional) Scale-in or scale-out cooldown periods are not supported from the console. Use the Amazon CLI to modify the cooldown values.

  11. For Minimum capacity, type the minimum number of shards that the ElastiCache (Redis OSS) Auto Scaling policy is required to maintain.

  12. For Maximum capacity, type the maximum number of shards that the ElastiCache (Redis OSS) Auto Scaling policy is required to maintain. This value must be less than or equal to 250.

  13. Choose Create.