Total raw capacity
1,500 RPS
Node Capacity Calculator
Estimate raw and safe throughput capacity for a multi-node setup.
Node capacity
Result
Safe planned capacity
1,200 RPS
How it works
The calculator multiplies node count by per-node throughput to compute raw cluster capacity, then applies reserve percentage for a safer operating envelope.
Formula
raw_capacity = node_count * capacity_per_node
safe_capacity = raw_capacity * (1 - reserve_pct/100)Reserve helps absorb spikes, node imbalance and transient degradation.
Example
For 6 nodes at 250 RPS each with 20% reserve, safe capacity is about 1200 RPS.
FAQ
Why keep reserve?
Reserve reduces risk during spikes and partial outages.
Can I use this for autoscaling thresholds?
Yes, safe capacity can guide alert and scaling triggers.
Should I include cross-zone overhead?
Yes, reduce per-node capacity if cross-zone or network cost is relevant.