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https://github.com/BagelHole/DevOps-Security-Agent-Skills.git
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70 lines
1.3 KiB
Markdown
70 lines
1.3 KiB
Markdown
---
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name: performance-tuning
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description: Optimize Linux system performance. Configure kernel parameters, analyze bottlenecks, and tune resources. Use when improving system performance.
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license: MIT
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metadata:
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author: devops-skills
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version: "1.0"
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---
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# Performance Tuning
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Optimize Linux system performance.
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## System Monitoring
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```bash
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top / htop # Process monitoring
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vmstat 1 # Memory statistics
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iostat -x 1 # Disk I/O
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sar -n DEV 1 # Network statistics
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perf top # CPU profiling
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```
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## Kernel Parameters
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```bash
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# /etc/sysctl.d/99-performance.conf
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vm.swappiness = 10
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net.core.somaxconn = 65535
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net.ipv4.tcp_max_syn_backlog = 65535
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fs.file-max = 2097152
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vm.dirty_ratio = 40
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vm.dirty_background_ratio = 10
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```
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## File Descriptor Limits
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```bash
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# /etc/security/limits.conf
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* soft nofile 65535
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* hard nofile 65535
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* soft nproc 65535
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* hard nproc 65535
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```
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## Disk I/O
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```bash
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# Change scheduler
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echo noop > /sys/block/sda/queue/scheduler
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# Enable trim for SSDs
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fstrim -av
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```
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## Network Tuning
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```bash
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# Increase buffers
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sysctl -w net.core.rmem_max=134217728
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sysctl -w net.core.wmem_max=134217728
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```
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## Best Practices
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- Profile before optimizing
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- Change one parameter at a time
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- Monitor impact of changes
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- Document all tuning
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