CostLensElastiCache Reserved Node Opportunity
ElastiCache Reserved Node Opportunity
CostLens surfaces AWS Cost Explorer reserved node purchase recommendations for steady-state ElastiCache clusters, with break-even and estimated savings.
Updated June 20261 min read
ElastiCache reserved nodes cost significantly less than on-demand for predictable cache clusters. CostLens reads AWS's Cost Explorer recommendation and presents it as a sized, actionable purchase option.
How it works
CostLens queries Cost Explorer
Calls ce:GetReservationPurchaseRecommendation for Amazon ElastiCache (runs once — Cost Explorer is global).
Parses each recommendation
Extracts node type, term, payment option, recommended quantity, estimated monthly savings, and break-even months.
Filters to meaningful spend
Only surfaces recommendations where covered on-demand spend exceeds $100/month.
What to do
- Open the recommendation — the detail view shows term, payment option, break-even months, and annual savings.
- Confirm the cache cluster is steady-state (reserved nodes are a 1- or 3-year commitment).
- Purchase the reserved nodes in the AWS console. This check is advisory.
Required IAM permissions
Read-only — covered by the CostLens ReadOnlyAccess policy from AWS Accounts:
ce:GetReservationPurchaseRecommendation
Limitations
- Advisory only — reserved node purchases are customer-initiated in the AWS console.
- Defaults to a 1-year, No Upfront recommendation; other terms can be compared in the AWS console.