> For the complete documentation index, see [llms.txt](https://docs.archera.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.archera.ai/help-center/cloud-service-intelligence/cloud-service-intelligence/aws/database/elasticache.md). # ElastiCache ## AWS ElastiCache — commitment brief > **Data sourced**: March 2026. Verify current figures at the [AWS Pricing Calculator](https://calculator.aws/pricing/2/home). ### Coverage summary Amazon ElastiCache supports Reserved Nodes (1-yr and 3-yr terms) for all provisioned cache node types, covering both Valkey/Redis OSS (formerly ElastiCache for Redis) and Memcached engines, and is also covered by **Database Savings Plans** (launched December 2025). Reserved Nodes offer savings of 32–55% versus on-demand pricing depending on term length and payment option. ElastiCache reserved nodes offer **instance size flexibility** within a node family — a single reservation for a cache.r7g.large can help cover a cache.r7g.xlarge running in the same region. ElastiCache Serverless is not eligible for Reserved Node pricing but may be covered by Database Savings Plans. **What is covered**: ElastiCache provisioned cache node compute charges (the per-node-hour cost) for both Valkey/Redis OSS and Memcached engines. **What is not covered**: ElastiCache Serverless charges (separate billing model), data transfer between nodes/AZs, backup storage (Redis snapshots), ElastiCache Global Datastore cross-region replication charges, and CloudWatch metrics. ### RI types > Amazon ElastiCache uses **Reserved Nodes** with three payment options: **All Upfront** (up to 55% discount for 3-yr), **Partial Upfront**, and **No Upfront**. There are no Convertible RIs, and EC2/Compute Savings Plans do not apply. Reserved Nodes offer size flexibility within a node family and region — a reservation for any size within a family (e.g., cache.r7g) can apply to other sizes in that family. ### Database Savings Plan > ElastiCache provisioned nodes are covered by **Database Savings Plans** (December 2025). Terms: **1-year only, No Upfront**. Discount: up to **\~35%** vs. on-demand. The same commitment applies flexibly across ElastiCache, RDS, Aurora, DynamoDB, DocumentDB, Neptune, and other eligible services. Reserved Nodes still deliver a higher discount ceiling (up to 55%) for stable, predictable footprints; Database SPs are better suited for variable or mixed database spend. ### Instance / node / tier coverage | Node Family | Engine | Reserved Node | Database SP | 1-yr RI (All Upfront) | 3-yr RI (All Upfront) | DB SP (1-yr No Upfront) | Notes | | --------------------------------------- | ------------------------------ | ------------- | ----------- | --------------------- | --------------------- | ----------------------- | ------------------------------------------------------- | | cache.r7g (Graviton3, memory optimized) | Valkey / Redis OSS | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Current-gen recommended; size flexibility within family | | cache.r6g (Graviton2, memory optimized) | Valkey / Redis OSS | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | cache.r6gd (Graviton2 + NVMe) | Valkey / Redis OSS | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Local NVMe-backed; size flexibility within family | | cache.r5 (x86, memory optimized) | Valkey / Redis OSS | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Previous-gen; size flexibility within family | | cache.m7g (Graviton3, general purpose) | Valkey / Redis OSS / Memcached | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | cache.m6g (Graviton2, general purpose) | Valkey / Redis OSS / Memcached | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | cache.m5 (x86, general purpose) | Valkey / Redis OSS / Memcached | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | cache.t4g (Graviton2, burstable) | Valkey / Redis OSS / Memcached | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | cache.t3 (x86, burstable) | Valkey / Redis OSS / Memcached | ✅ Yes | ✅ Yes | \~32–38% | \~50–55% | \~35% | Size flexibility within family | | ElastiCache Serverless | — | ❌ No | ⚠️ Partial | — | — | varies | Check Database SP eligibility for Serverless billing | ## Regional availability **Commitment scope**: Regional — Reserved Nodes are purchased for a specific AWS region and engine; the reservation applies to usage in that region only. Database Savings Plans are region-flexible and apply across all covered database services in any supported region. Available in all commercial AWS regions. Reserved Node size flexibility (within a node family) became available in all regions effective October 2024. Newer Graviton3 node types (m7g, r7g) are rolling out to additional regions — verify availability before purchasing. **Partition notes**: GovCloud (us-gov-*) regions support ElastiCache Reserved Nodes, with the exception that the r6gd node type and data-tiering are not available in GovCloud. Database Savings Plans cannot be purchased from GovCloud accounts (purchase via a linked standard account) and are not available in China (cn-*) regions. ⚠️ Regional and partition availability varies by instance type. Always verify at the [AWS Pricing Console](https://aws.amazon.com/ec2/pricing/) before purchasing. ### Archera Amazon ElastiCache is a core service within Archera's commitment management scope. Archera can automate Reserved Node purchases for both Valkey/Redis OSS and Memcached workloads, monitor utilization across size-flexible node families, and wrap commitments in a GRI/GSP — eliminating downside risk on over-commitment while preserving the full reservation discount. *** **Sources** * [Amazon ElastiCache Pricing](https://aws.amazon.com/elasticache/pricing/) * [Reserved nodes — Amazon ElastiCache](https://docs.aws.amazon.com/AmazonElastiCache/latest/dg/CacheNodes.Reserved.html) * [Amazon ElastiCache reserved nodes (cost optimization whitepaper)](https://docs.aws.amazon.com/whitepapers/latest/cost-optimization-reservation-models/amazon-elasticache-reserved-nodes.html) * [Size flexibility for Amazon ElastiCache reserved nodes](https://aws.amazon.com/blogs/database/new-size-flexibility-for-amazon-elasticache-reserved-nodes/) * [Database Savings Plans](https://aws.amazon.com/savingsplans/database-pricing/) * [Introducing Database Savings Plans for AWS databases](https://aws.amazon.com/blogs/aws/introducing-database-savings-plans-for-aws-databases/) ⚠️ Discount percentages are approximate and region/node-type-dependent. Always verify with the [AWS Pricing Calculator](https://calculator.aws/pricing/2/home). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.archera.ai/help-center/cloud-service-intelligence/cloud-service-intelligence/aws/database/elasticache.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. 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