Documentation Index
Fetch the complete documentation index at: https://docs.ultrabalancer.com/llms.txt
Use this file to discover all available pages before exploring further.
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
Quick Wins
Optimal Configuration
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
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
System-Level Tuning
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
