Memory Growth Forecast
Forecast future memory consumption from historical usage trend and growth rate.
Inputs
Utilization % that triggers capacity planning
Months to Alert Threshold
5months
Months to Full
10months
Current Utilization
75.0%
Projected Usage (6 months)
57.3GB
Projected Usage (12 months)
68.4GB
Step by step
Current utilization
48 / 64 × 100
= 75%
Months to threshold
log(54.4 / 48) / log(1 + 0.03)
= 5 months
6-month projection
48 × (1 + 0.03)^6
= 57.3 GB
How it works
Memory growth forecasting uses exponential growth modeling (compounding monthly) to estimate when RAM utilization will exceed a planning threshold or hit physical capacity. This gives operations teams lead time to procure additional RAM, optimize workloads, or migrate to larger instances before applications start experiencing OOM kills or excessive swapping.
Formula
Months to threshold
months = log(threshold / current) / log(1 + monthly_growth_rate)
- T
- threshold memory level
- C
- current usage
- g
- monthly growth rate
Frequently Asked Questions
How should I measure monthly memory growth?
Sample peak memory usage (from free, /proc/meminfo, or monitoring tools) at consistent intervals over several months. Use the average month-over-month percentage change as the growth rate, excluding anomalous spikes from deployments or incidents.
What threshold should trigger action?
85% utilization is a common planning threshold — it leaves enough headroom for burst workloads while providing several weeks of lead time for capacity expansion at typical growth rates.