> ## 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.

# Performance Tuning

> Optimize UltraBalancer for maximum throughput, low latency, and efficient resource usage

## Overview

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

<CardGroup cols={2}>
  <Card title="System Tuning" icon="server">
    OS-level optimizations
  </Card>

  <Card title="Configuration" icon="sliders">
    Application settings
  </Card>

  <Card title="Network Tuning" icon="network-wired">
    TCP and network stack
  </Card>

  <Card title="Monitoring" icon="chart-line">
    Performance monitoring
  </Card>
</CardGroup>

## Quick Wins

### Optimal Configuration

```yaml config-optimized.yaml theme={null}
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

```bash theme={null}
# 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

```bash theme={null}
# /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
```

## Performance Benchmarks

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