Azure Redis Cost Optimization
Reference guide for identifying cost savings opportunities in Azure Redis deployments through analysis and targeted scans.
Subscription Input Options
Accept any of these identifiers to identify subscriptions for analysis:
| Input Type | Example | Use Case |
|---|---|---|
| Subscription ID | a1b2c3d4-... | Analyze specific subscription |
| Subscription Name | Production-Environment | User-friendly identifier |
| Subscription Prefix | CacheTeam - | Analyze all team subscriptions |
| Tenant ID | tenant-guid | Analyze entire organization |
| "All my subscriptions" | (keyword) | Scan all accessible subscriptions |
Cost Optimization Rules
When analyzing each cache, apply these prioritized rules:
| Priority | Rule | Detection Logic | Recommendation | Avg Savings |
|---|---|---|---|---|
| 🔴 Critical | Failed Cache | provisioningState == 'Failed' | Delete immediately | $50-300/mo |
| 🔴 Critical | Stuck Creating | provisioningState == 'Creating' AND age >4 hours | Delete/support ticket | $50-300/mo |
| 🟠 High | Premium in Dev | sku.name == 'Premium' AND tags.environment in ['dev','test','staging'] | Downgrade to Standard | $175/mo |
| 🟠 High | Enterprise Unused | sku.name startsWith 'Enterprise' AND no modules/clustering | Downgrade to Premium/Standard | $300-1000/mo |
| 🟠 High | Old Test Cache | tags.purpose == 'test' AND age >60 days | Delete or downgrade | $50-150/mo |
| 🟡 Medium | Large Dev Cache | sku.capacity >3 AND tags.environment == 'dev' | Reduce size | $100-300/mo |
| 🟡 Medium | No Expiration Tag | Missing expirationDate or ttl tag | Add cleanup policy | N/A |
| 🟢 Low | Untagged Resource | Missing required tags (environment, owner) | Apply tags | N/A |
| 🟢 Low | Old Cache | Age >365 days | Review if still needed | Variable |
Report Templates
Subscription-Level Summary
Quick overview of costs and issues per subscription (use for multi-subscription scans). Include: subscription name/ID, total monthly cost, number of caches, cache count by SKU tier, and top issues found.
Detailed Cache Analysis
Individual cache breakdown with specific recommendations. Include: cache name, resource group, SKU tier, current cost, memory usage %, CPU usage %, connection count, and specific rightsizing recommendations.
Tools & Commands
MCP Tool: azure__redis with command redis_list (parameter: subscription)
Azure CLI Equivalents:
az account list- List subscriptionsaz redis list --subscription <id>- List Redis cachesaz redis show- Get cache detailsaz redis delete- Remove cache