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Overview

Optimize UltraBalancer performance through system tuning, configuration adjustments, and best practices.

System Tuning

OS-level optimizations

Configuration

Application settings

Network Tuning

TCP and network stack

Monitoring

Performance monitoring

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Quick Wins

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Optimal Configuration

config-optimized.yaml
listen_address: "0.0.0.0"
listen_port: 80
algorithm: "least-connections"  # Best for most workloads
workers: auto                   # Match CPU cores

backends:
  - host: "backend1"
    port: 8080
    max_connections: 5000       # Increase per-backend limit

health_check:
  enabled: true
  interval_ms: 3000             # Faster detection
  timeout_ms: 1000              # Aggressive timeout

timeout:
  connect_ms: 3000              # Quick connection timeout
  request_ms: 15000             # Fast request timeout

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System Limits

# Increase file descriptors
sudo tee -a /etc/security/limits.conf << 'EOF'
* soft nofile 65535
* hard nofile 65535
EOF

# Apply immediately
ulimit -n 65535

# Verify
ulimit -n

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System-Level Tuning

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Linux Kernel Parameters

# /etc/sysctl.conf
sudo tee -a /etc/sysctl.conf << 'EOF'
# TCP performance
net.core.somaxconn = 65535
net.ipv4.tcp_max_syn_backlog = 8192
net.core.netdev_max_backlog = 65535

# Connection tracking
net.netfilter.nf_conntrack_max = 1048576

# TCP tuning
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_tw_buckets = 1440000
net.ipv4.ip_local_port_range = 1024 65535

# Buffer sizes
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
EOF

# Apply settings
sudo sysctl -p

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Performance Benchmarks

Before optimization: 145k RPS After optimization: 185k RPS (+27%)