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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/chaterm/terminal-skills --skill tuning- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads tuning automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
系统调优
概述
内核参数、文件系统、网络优化技能。
内核参数调优
内存管理
# /etc/sysctl.d/99-memory.conf
# 减少交换倾向
vm.swappiness = 10
# 脏页刷新
vm.dirty_ratio = 20
vm.dirty_background_ratio = 5
# 内存过量提交
vm.overcommit_memory = 1
vm.overcommit_ratio = 80
# 最大内存映射数
vm.max_map_count = 262144
# 应用
sysctl -p /etc/sysctl.d/99-memory.conf
网络调优
# /etc/sysctl.d/99-network.conf
# TCP 缓冲区
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
# 连接队列
net.core.somaxconn = 65535
net.core.netdev_max_backlog = 65535
net.ipv4.tcp_max_syn_backlog = 65535
# TIME_WAIT
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_tw_buckets = 65535
# 端口范围
net.ipv4.ip_local_port_range = 1024 65535
# Keep-Alive
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
文件系统
# /etc/sysctl.d/99-fs.conf
# 文件句柄
fs.file-max = 2097152
fs.nr_open = 2097152
# inotify
fs.inotify.max_user_watches = 524288
fs.inotify.max_user_instances = 512
文件描述符限制
ulimit 配置
# /etc/security/limits.conf
* soft nofile 65535
* hard nofile 65535
* soft nproc 65535
* hard nproc 65535
root soft nofile 65535
root hard nofile 65535
systemd 服务
# /etc/systemd/system/myapp.service.d/limits.conf
[Service]
LimitNOFILE=65535
LimitNPROC=65535
磁盘 IO 调优
IO 调度器
# 查看当前调度器
cat /sys/block/sda/queue/scheduler
# 设置调度器
echo deadline > /sys/block/sda/queue/scheduler
echo noop > /sys/block/sda/queue/scheduler # SSD
echo mq-deadline > /sys/block/nvme0n1/queue/scheduler
# 永久设置 (GRUB)
GRUB_CMDLINE_LINUX="elevator=deadline"
预读设置
# 查看预读
blockdev --getra /dev/sda
# 设置预读 (KB)
blockdev --setra 4096 /dev/sda
挂载选项
# /etc/fstab
# SSD 优化
/dev/sda1 /data ext4 defaults,noatime,nodiratime,discard 0 2
# 数据库优化
/dev/sdb1 /mysql ext4 defaults,noatime,barrier=0 0 2
CPU 调优
CPU 频率
# 查看调速器
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
# 设置性能模式
cpupower frequency-set -g performance
# 或直接设置
echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
NUMA 优化
# 查看 NUMA 信息
numactl --hardware
numastat
# 绑定 NUMA 节点
numactl --cpunodebind=0 --membind=0 ./program
# 查看进程 NUMA 分布
numastat -p PID
CPU 亲和性
# 查看亲和性
taskset -p PID
# 设置亲和性
taskset -c 0-3 ./program
taskset -pc 0-3 PID
常见场景
场景 1：Web 服务器优化
# /etc/sysctl.d/99-web.conf
net.core.somaxconn = 65535
net.ipv4.tcp_max_syn_backlog = 65535
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 30
net.core.netdev_max_backlog = 65535
# 文件描述符
fs.file-max = 2097152
场景 2：数据库服务器优化
# /etc/sysctl.d/99-database.conf
vm.swappiness = 1
vm.dirty_ratio = 40
vm.dirty_background_ratio = 10
vm.overcommit_memory = 1
# 大页内存
vm.nr_hugepages = 1024
场景 3：高并发优化
#!/bin/bash
# 一键优化脚本
# 网络
sysctl -w net.core.somaxconn=65535
sysctl -w net.ipv4.tcp_max_syn_backlog=65535
sysctl -w net.ipv4.ip_local_port_range="1024 65535"
# 文件
sysctl -w fs.file-max=2097152
# 内存
sysctl -w vm.swappiness=10
调优检查
| 项目 | 检查命令 |
|---|---|
| 文件限制 | ulimit -n |
| 网络参数 | sysctl -a | grep net |
| 内存参数 | sysctl -a | grep vm |
| IO 调度 | cat /sys/block/*/queue/scheduler |
故障排查
# 检查当前限制
cat /proc/PID/limits
# 检查打开文件数
ls /proc/PID/fd | wc -l
lsof -p PID | wc -l
# 检查网络连接
ss -s
netstat -an | awk '/tcp/ {print $6}' | sort | uniq -c
FAQ
What does the tuning skill do?
系统调优
How do I install tuning?
Run npx skills add https://github.com/chaterm/terminal-skills --skill tuning in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/tuning/ (personal) or .claude/skills/tuning/ (project).
Which AI agents can use tuning?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is tuning safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains tuning?
It is published by chaterm in chaterm/terminal-skills. It has 78 recorded installs.
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