VENOM: Mempool Capacity
$X(N)=\frac{\lambda N}{1+\sigma(N-1)+\kappa N(N-1)}$
Equation
X(N)=(lambda N)/(1+sigma(N-1)+kappa N(N-1))
N is a number of nodes
X(N) is throughput of the system of N nodes, e.g., 100 requests per second
λ is a throughput of the system with one node X(1)
σ is a coefficient of contention, e.g., σ=0.05 (5%)
κ is a coefficient of crosstalk, e.g., κ=0.02 (2%)
Usage
Start
docker-compose up
Monitor
Grafana
usr: admin
paswd: admin
http://localhost:3000/d/__zqZa-Zz/rpc-capacity-manager?orgId=1&refresh=5s
Prometheus
Naive Adaptive
ORIGIN_WORKTIME=2s CLIENT_ORIGIN=http://proxy:7000 PROXY_ADAPTIVE=true docker-compose up
Results
client sends 5 requests per second and receives between 2.4 rps and 2.7 rps (HTTP 200) proxy oscillates between 4 and 6 in-flight requests origin processes between 2.7 and 3 requests per second origin has served requests with average latency 2.2 seconds origin has served 50% of requests (50th percentile) within 2 seconds origin has served 99% of requests (99th percentile) within 3 seconds with periodic spikes
