Technology & Computing
Redis Cache Memory & Eviction Calculator
Estimate total Redis memory usage from key count, average value size and per-key overhead, and eviction risk.
Your inputs
Change any value to update the result instantly.
Estimated memory usage
1.3318 GB
Bytes per key (incl. overhead)
286 B
Configured maxmemory
16 GB
Memory utilization
8.3237%
Total keys
50,00,000
Comfortably under maxmemory; eviction unlikely unless traffic spikes.
Formula and working
Memory ≈ keys × (avg key bytes + avg value bytes + per-key overhead)
- 1
Collect the inputs
Number of keys = 5,000,000; Average key size (bytes) = 30 B; Average value size (bytes) = 200 B; Per-key overhead (Redis structure) = 56 B; Configured maxmemory (GB) = 16 GB
- 2
Apply the formula
Memory ≈ keys × (avg key bytes + avg value bytes + per-key overhead)
- 3
Result
Estimated memory usage = 1.3318 GB
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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