performance-tuning

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Original

English

🇨🇳

Translation

Chinese

Performance Tuning

性能调优

Optimize Linux system performance.

优化Linux系统性能。

System Monitoring

系统监控

bash

top / htop                # Process monitoring
vmstat 1                  # Memory statistics
iostat -x 1               # Disk I/O
sar -n DEV 1              # Network statistics
perf top                  # CPU profiling

bash

top / htop                # Process monitoring
vmstat 1                  # Memory statistics
iostat -x 1               # Disk I/O
sar -n DEV 1              # Network statistics
perf top                  # CPU profiling

Kernel Parameters

内核参数

bash

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bash

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/etc/sysctl.d/99-performance.conf

vm.swappiness = 10 net.core.somaxconn = 65535 net.ipv4.tcp_max_syn_backlog = 65535 fs.file-max = 2097152 vm.dirty_ratio = 40 vm.dirty_background_ratio = 10

undefined

vm.swappiness = 10 net.core.somaxconn = 65535 net.ipv4.tcp_max_syn_backlog = 65535 fs.file-max = 2097152 vm.dirty_ratio = 40 vm.dirty_background_ratio = 10

undefined

File Descriptor Limits

文件描述符限制

bash

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bash

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/etc/security/limits.conf

soft nofile 65535
hard nofile 65535
soft nproc 65535
hard nproc 65535

undefined

soft nofile 65535
hard nofile 65535
soft nproc 65535
hard nproc 65535

undefined

Disk I/O

磁盘I/O调优

bash

undefined

bash

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Change scheduler

echo noop > /sys/block/sda/queue/scheduler

Enable trim for SSDs

fstrim -av

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fstrim -av

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Network Tuning

网络调优

bash

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bash

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Increase buffers

sysctl -w net.core.rmem_max=134217728 sysctl -w net.core.wmem_max=134217728

undefined

sysctl -w net.core.rmem_max=134217728 sysctl -w net.core.wmem_max=134217728

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Best Practices

最佳实践

Profile before optimizing
Change one parameter at a time
Monitor impact of changes
Document all tuning

优化前先进行性能分析
每次仅修改一个参数
监控参数变更带来的影响
记录所有调优操作