Cache parameter group tiers in ElastiCache - Amazon ElastiCache

Cache parameter group tiers in ElastiCache

Amazon ElastiCache has three tiers of cache parameter groups as shown following.

Image: Amazon ElastiCache parameter group tiers

Amazon ElastiCache parameter group tiers

Global Default

The top-level root parameter group for all Amazon ElastiCache customers in the region.

The global default cache parameter group:

  • Is reserved for ElastiCache and not available to the customer.

Customer Default

A copy of the Global Default cache parameter group which is created for the customer's use.

The Customer Default cache parameter group:

  • Is created and owned by ElastiCache.

  • Is available to the customer for use as a cache parameter group for any clusters running an engine version supported by this cache parameter group.

  • Cannot be edited by the customer.

Customer Owned

A copy of the Customer Default cache parameter group. A Customer Owned cache parameter group is created whenever the customer creates a cache parameter group.

The Customer Owned cache parameter group:

  • Is created and owned by the customer.

  • Can be assigned to any of the customer's compatible clusters.

  • Can be modified by the customer to create a custom cache parameter group. ‡

    ‡ Not all parameter values can be modified. For more information on Memcached values, see Memcached specific parameters. For more information on Valkey and Redis OSS values, see Valkey and Redis OSS parameters.