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Linux Low Memory Optimization

Enable SWAP

1. Check current SWAP status

   sudo swapon --show

2. Create SWAP file

   fallocate -l 4G /swapfile

3. Set permissions

   chmod 600 /swapfile

4. Format and enable SWAP

   mkswap /swapfile
   swapon /swapfile

5. Set auto-mount on boot

   echo '/swapfile none swap sw 0 0' | tee -a /etc/fstab

Enable ZRAM

Debian / Ubuntu

1. Install

   apt update
   apt install zram-tools -y

2. Modify configuration file

   nano /etc/default/zramswap

   Add or modify the following:

   # Use lz4 compression algorithm for the best balance of speed and ratio
   ALGO=lz4
   
   # Use 60% of total memory as ZRAM size
   PERCENT=60
   
   # [Crucial] Set priority to 100.
   # As long as this is higher than disk Swap (usually -2), the system will prioritize ZRAM.
   PRIORITY=100

   Press Ctrl+O Enter to save, Ctrl+X to exit.

3. Restart service

   systemctl daemon-reload
   systemctl restart zramswap

CentOS / Arch Linux

Recommended to use zram-generator for these systems.

1. Install

   # CentOS 8/9, Fedora, AlmaLinux, Rocky Linux
   dnf install zram-generator -y
   
   # Arch Linux
   pacman -S zram-generator

2. Modify configuration file Create or edit /etc/systemd/zram-generator.conf:

   [zram0]
   # Use 60% of total memory
   zram-size = ram * 0.6
   # Use lz4 compression algorithm
   compression-algorithm = lz4
   # Higher priority than disk Swap
   swap-priority = 100

3. Start service

   systemctl daemon-reload
   systemctl start systemd-zram-setup@zram0

General Optimization

Regardless of the system, it is recommended to adjust swappiness to use ZRAM more aggressively.

grep -q "vm.swappiness" /etc/sysctl.conf || echo "vm.swappiness=20" | tee -a /etc/sysctl.conf
sysctl -p

Disable Site Isolation (fission.autostart)

For servers with extremely tight memory (e.g., 1GB RAM), if the system still crashes frequently after enabling SWAP and ZRAM, you can try disabling Firefox's Site Isolation as a last resort.

Risk Disclosure

Disabling Site Isolation reduces the uniqueness of the browser fingerprint, potentially making it easier for high-level anti-bot systems to identify (e.g., by detecting single-process model or inter-process communication delays). Use only when necessary.

1. Modify config.yaml:

   browser:
     # ...
     # Disable site isolation to significantly reduce memory footprint
     fission: false

2. Restart WebAI2API service.

Tip

After completing the configuration, it is recommended to restart the server to ensure all settings take effect.