# AWS ElastiCache optimization | Cloud Efficiency Hub Canonical: https://www.pointfive.co/efficiency-hub/cloud-services/aws-elasticache 8 documented AWS ElastiCache cost inefficiencies, each with how to detect it and how to fix it. [Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) 8 documented AWS ElastiCache cost inefficiencies, each with how to detect it and how to fix it. ## 8 inefficiencies [All services](https://www.pointfive.co/efficiency-hub#browse-by-service) - AWS ElastiCache CER-0321 ### [Suboptimal Cache TTL Strategy Causing Repeated Backend Execution](https://www.pointfive.co/efficiency-hub/inefficiencies/suboptimal-cache-ttl-strategy-causing-repeated-backend-execution) Organizations deploy ElastiCache to reduce load on backend systems - databases, APIs, and compute layers - by serving frequently accessed data from fast in-memory storage. However, when Time-to-Live (TTL) values are misaligned with actual... Databases - AWS ElastiCache CER-0284 ### [Outdated ElastiCache Engine Version Incurring Extended Support Charges](https://www.pointfive.co/efficiency-hub/inefficiencies/outdated-elasticache-engine-version-incurring-extended-support-charges) ElastiCache clusters continue running engine versions that have moved into extended support. While the service remains functional, AWS charges an ongoing premium for extended support that provides no added performance or capability. These... Databases - AWS ElastiCache CER-0146 ### [Non-Graviton ElastiCache Node on Eligible Workload](https://www.pointfive.co/efficiency-hub/inefficiencies/non-graviton-elasticache-node-on-eligible-workload) Many Redis and Memcached clusters still use legacy x86-based node types (e.g., cache.r5, cache.m5) even though Graviton-based alternatives are available. In-memory workloads tend to be highly compatible with Graviton due to their... Databases - AWS ElastiCache CER-0105 ### [Suboptimal ElastiCache Engine Selection](https://www.pointfive.co/efficiency-hub/inefficiencies/suboptimal-elasticache-engine-selection) Many workloads default to using Redis or Memcached without evaluating whether a lighter or more efficient engine would provide equivalent functionality at lower cost. Valkey is a Redis-compatible, open-source engine supported by... Databases - AWS ElastiCache CER-0152 ### [Underutilized ElastiCache Node](https://www.pointfive.co/efficiency-hub/inefficiencies/underutilized-elasticache-node) ElastiCache clusters are often sized for peak performance or reliability assumptions that no longer reflect current workload needs. When memory and CPU usage remain consistently low, the node is likely overprovisioned. For Redis, memory is... Databases - AWS ElastiCache CER-0078 ### [Outdated ElastiCache Node Type](https://www.pointfive.co/efficiency-hub/inefficiencies/outdated-elasticache-node-type) Some ElastiCache clusters continue to run on older-generation node types that have since been replaced by newer, more cost-effective options. This can happen due to legacy templates, lack of version validation, or infrastructure that has... Databases - AWS ElastiCache CER-0371 ### [Low Reserved Node Coverage for Steady-State ElastiCache Clusters](https://www.pointfive.co/efficiency-hub/inefficiencies/low-reserved-node-coverage-for-steady-state-elasticache-clusters) Node-based ElastiCache clusters behind production applications, such as caches, session stores and Valkey or Redis OSS data stores, typically run around the clock for years. Their node-hours are still often billed at On-Demand rates,... Databases - AWS ElastiCache CER-0373 ### [Inactive ElastiCache Cluster](https://www.pointfive.co/efficiency-hub/inefficiencies/inactive-elasticache-cluster) ElastiCache clusters are often created alongside an application and outlive it: the application is retired, migrated to a new cache, or switched to another data store, but the cluster, its replicas and its backups remain. A node-based... Databases ## More AWS services - [AWS EC2 23](https://www.pointfive.co/efficiency-hub/cloud-services/aws-ec2) - [AWS RDS 19](https://www.pointfive.co/efficiency-hub/cloud-services/aws-rds) - [AWS S3 15](https://www.pointfive.co/efficiency-hub/cloud-services/aws-s3) - [AWS Lambda 12](https://www.pointfive.co/efficiency-hub/cloud-services/aws-lambda) - [AWS EBS 10](https://www.pointfive.co/efficiency-hub/cloud-services/aws-ebs) - [AWS CloudWatch 8](https://www.pointfive.co/efficiency-hub/cloud-services/aws-cloudwatch) - [AWS EKS 8](https://www.pointfive.co/efficiency-hub/cloud-services/aws-eks) - [AWS DynamoDB 7](https://www.pointfive.co/efficiency-hub/cloud-services/aws-dynamodb) - [AWS Bedrock 6](https://www.pointfive.co/efficiency-hub/cloud-services/aws-bedrock) - [AWS ELB 6](https://www.pointfive.co/efficiency-hub/cloud-services/aws-elb) --- Source: the public page above. Product screenshots and illustrative interfaces are examples, not live customer data.