From Windows to Ubuntu: A Complete Guide to Migration and Configuration

(1) Migrate from Windows 10 to Ubuntu – Previous: Preparation before installation

(2) Migrate to Ubuntu from Windows 10 – Next: Ubuntu 26.04 Installation and First Time Configuration

(3) Ubuntu initialization configuration (basic settings, software installation)

(4) Ubuntu Disk Planning: Migrate /home to the second block SSD

(5) Ubuntu 26.04 software installation and maintenance best practices: take WeChat as an example

(6) Solve the problem that the Linux WeChat “Save As” dialog box only displays two folders

(7) Ubuntu 26.04 Input Method Tossing Notes: From FcitX5 Self-Starting Failed to Wubi Pinyin Stable Use

(8) Ubuntu dual-screen configuration actual combat: ThinkPad T570 external monitor, the left screen and the right are more convenient

(9) From Siyuan to Mengyuan: Understand the “toss” of the Song Dynasty on Ubuntu 26.04

(10) Configure development environment: Manage multi-version MySQL and Redis with Docker

(11) Push from Baidu API to AI IDE selection: how do I get the trae installation and prepare to start work

(12) Ubuntu 26.04 Mail Client Tossing Notes: From NetEase Mailbox Master to Thunderbird, add 8 mailboxes in one go

(13) Under Ubuntu 26.04 High memory usage optimization full record | Same as 60 tags, Win10≈7GB, Ubuntu skyrocketed to 20GB row pit record

(14) Ubuntu 26.04 + Docker build a Go Gin development environment (full record)

(15) Ubuntu opens the Windows document and prompts “Invalid Characters”? my solution

(16) Say goodbye to passwords and disconnects: Alibaba Cloud ECS SSH password-free login and heartbeat preservation practice

(17) Try Dev Containers in Trae CN: A not very successful step on the pit record

(18) From zero to one: Build a Go + Gin development environment in Trae CN + Docker

(19) Farewell to WeChat window restrictions: use Flameshot to bind global ALT+A screenshots in Ubuntu 26.04

(20) Ubuntu 26.04 Software Installation and Maintenance Best Practice Update: From Chrome Memory Surge to Discharge Pits to Deprecated Flatpak

(21) Migrating from Chrome to Firefox under Ubuntu 26.04: my tossing experience

(22) Input method selection failure record from Windows to Ubuntu:rime → wbpy

(23) Ubuntu 26.04 desktop performance optimization actual combat: a complete tuning record from stuck to stable operation

🧭 1. Background: The Linux desktop is starting to have problems with stuck and OOM

During the daily use of Ubuntu 26.04 LTS (ThinkPad T570), the following problems gradually arise:

• Firefox is occasionally stuck and even forced to shut down by the system
• Clash Verge memory usage continues to grow
• Gnome Input delay, window freeze
• The system is unstable at the same time when multiple applications are running at the same time

The initial judgment is:

🧠 Memory scheduling + Swap policy + Electron application overlays cause high system pressure

⚙️ 2. Optimization goals

This optimization goal:

• Improve desktop stability
• Reduce memory peak impact
• Optimize VPN + browser concurrency scenarios
• Reduce Oom Killer trigger probability

🧩 3. Basic system information

Equipment environment:

• ThinkPad T570
• Ubuntu 26.04 LTS
• Gnome Wayland
• Firefox + Clash Verge resident

Memory configuration:

• 16GB RAM
• swap.img 4GB
• ZRAM 7.4GB

🛠️ 4. Core optimization process

🧊 1. Install ZRAM (improve memory buffering)

sudo apt install zram-tools

sudo apt install zram-tools

function:

• Use a portion of memory compression as swap
• Improve high-load scenario stability
• Reduce disk Swap usage frequency

⚙️ 2. Adjust Swap Policy (SWAPPINESS)

Original value:

vm.swappiness = 60

vm.swappiness = 60

Adjust to:

sudo sysctl vm.swappiness=10

sudo sysctl vm.swappiness=10

and write:

/etc/sysctl.conf

/etc/sysctl.conf

Optimization meaning:

• Reduce SWAP usage frequency
• Prioritize use of RAM + ZRAM
• Avoid desktop shaking and stuck

After restarting you should observe these two points:

swapon --show

swapon --show

cat /proc/sys/vm/swappiness

cat /proc/sys/vm/swappiness

🧠 3. Firefox performance optimization

Key parameter adjustment:

about:config

about:config

dom.ipc.processCount = 4
browser.sessionstore.interval = 30000
browser.tabs.unloadOnLowMemory = true

dom.ipc.processCount = 4
browser.sessionstore.interval = 30000
browser.tabs.unloadOnLowMemory = true

Optimization effect:

• Reduce multi-process usage
• Control Tab Memory Growth
• Reduce background write pressure

🌐 4. Clash Verge Optimization (Key Step)

⚡ Enable light weight mode (finally execute)

path:

Verge → 高级设置 → 轻量模式

Verge → 高级设置 → 轻量模式

Also optimize:

• Log level: Info → warn
• Close flow chart
• Turn off the kernel usage display

Optimization effect:

• Memory usage from 500MB → 150~200MB
• The burden of UI rendering is greatly reduced
• The Electron resident process is significantly reduced

Reference:🚀 Clash Verge from 500MB to 200MB: Ubuntu VPN client lightweight optimization practice

🎨 5. GNOME Extension Check

Current extension:

• ubuntu-dock
• tiling-assistant
• Snapd Components

Conclusion:

Keep core extensions to avoid excessive UI plugins affecting performance

📊 5. Optimization results comparison

🧠 6. Summary of core optimization ideas

The core of this optimization is not a ‘single point adjustment’, but a three-layer structure optimization:

🧩 1. Memory structure optimization

• RAM + ZRAM + SWAP three-layer system

🧩 2. Application layer optimization

• Firefox restricts multiprocessing
• Clash Verge Lightweight Mode

🧩 3. System scheduling optimization

• swappiness reduced to 10
• Reduce SWAP interference

🚀 Seven, key experience summary

The root cause of the Linux desktop lag is often not ‘insufficient memory’, but ‘unreasonable memory scheduling policy + Electron application overlay load’.

📌 8. Applicable scenarios

This article applies to:

• Ubuntu 22.04 / 24.04 / 26.04
• GNOME Desktop Environment
• Clash Verge / Electron tool users
• Firefox heavy users
• Open VPN + browser parallel work scenarios for a long time

🎯 Nine, the conclusion

Through this optimization, the system enters a stable operation mode from the state of ‘occasional stuttering + memory fluctuation’.

The overall experience changes are very obvious:

🧠 From ‘Desktop Unstable’ → ‘Can be used for a long time’