https://github.com/volkansah/advanced-ram-use-on-bash-installed-systems
These tips and tricks can help optimize and clean up your RAM on Bash-installed systems, improving system performance and reducing the likelihood of crashes and freezes due to insufficient memory.
https://github.com/volkansah/advanced-ram-use-on-bash-installed-systems
bash bash-script linux memory ram tips-and-tricks zram zram-devices zram-swap
Last synced: 6 months ago
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These tips and tricks can help optimize and clean up your RAM on Bash-installed systems, improving system performance and reducing the likelihood of crashes and freezes due to insufficient memory.
- Host: GitHub
- URL: https://github.com/volkansah/advanced-ram-use-on-bash-installed-systems
- Owner: VolkanSah
- Created: 2023-02-26T00:32:41.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-10-18T07:37:35.000Z (12 months ago)
- Last Synced: 2025-04-11T18:03:01.152Z (6 months ago)
- Topics: bash, bash-script, linux, memory, ram, tips-and-tricks, zram, zram-devices, zram-swap
- Language: Shell
- Homepage:
- Size: 50.8 KB
- Stars: 2
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
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README
# Advanced RAM use on Bash-installed Systems (2024)
This guide provides scripts and tips to optimize RAM usage on systems with Bash installed.
## Table of Contents
- [Free Memory Management](#free-memory-management)
- [Clean RAM Script](#clean-ram-script)
- [ZRAM Usage](#zram-usage)
- [Check ZRAM Installation](#check-zram-installation)
- [Create and Configure ZRAM](#create-and-configure-zram)
- [Mount ZRAM as Swap](#mount-zram-as-swap)
- [ZRAM Swap as Percentage of RAM](#zram-swap-as-percentage-of-ram)
- [Additional Tips](#additional-tips)
- [Lightweight Window Manager](#lightweight-window-manager)
- [Disable Unnecessary Services](#disable-unnecessary-services)
- [Close Unused Applications](#close-unused-applications)
- [Prioritize Processes](#prioritize-processes)
- [Clear Disk Cache](#clear-disk-cache)
- [Set Process Limits](#set-process-limits)
## Free Memory Management
### Clean RAM Script
Use this script in a cron job to clean RAM if usage exceeds 90%.
```bash
#!/bin/bash
# Set the threshold for free memory in bytes (90% of total RAM)
THRESHOLD=$(( 90 * $(grep MemTotal /proc/meminfo | awk '{print $2}') / 100 ))
# Get current free memory
FREE=$(grep MemAvailable /proc/meminfo | awk '{print $2}')
# Clean RAM if free memory is below threshold
if [ $FREE -lt $THRESHOLD ]; then
echo "Cleaning RAM..."
sync && echo 3 > /proc/sys/vm/drop_caches
echo "RAM cleaned."
else
echo "No need to clean RAM."
fi
```
Make the script executable and schedule it to run every 5 minutes:
```bash
chmod +x clean_ram.sh
crontab -e
```
Add the following line to the crontab:
```bash
*/5 * * * * /path/to/clean_ram.sh
```
## ZRAM Usage
### Check ZRAM Installation
Verify if ZRAM is installed:
```bash
lsmod | grep zram
```
If not installed, use your package manager to install it.
### Create and Configure ZRAM
Create a ZRAM device and set its size to 1 GB with compression:
```bash
sudo modprobe zram num_devices=1
sudo zramctl -f -s 1G -t 2
```
Set the swappiness value:
```bash
sudo sysctl -w vm.swappiness=10
```
### Mount ZRAM as Swap
Format and activate the ZRAM device as swap:
```bash
sudo mkswap /dev/zram0
sudo swapon /dev/zram0
````
Verify ZRAM usage:
```bash
sudo swapon -s
```
### ZRAM Swap as Percentage of RAM
Create ZRAM swap space as 25% of physical RAM:
```bash
sudo zramctl --find --size $(($(free | awk '/^Mem:/{print $2}') / 4)) --mkswap
sudo swapon /dev/zram0
```
## Additional Tips
### Lightweight Window Manager
Use lightweight window managers like Xfce, LXDE, or Openbox to reduce memory usage.
### Disable Unnecessary Services
Disable services to free up memory and reduce CPU usage:
```bash
sudo systemctl disable
```
### Close Unused Applications
Use \`htop\` or \`top\` to monitor and close unused applications.
### Prioritize Processes
Adjust process priority with \`nice\`:
```bash
nice -n
```
### Clear Disk Cache
Free up memory by clearing disk cache:
```bash
sudo sync
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
```
### Set Process Limits
Use \`ulimit\` to set limits on system resources for processes:
```bash
ulimit -m
ulimit -t
```
These tips help optimize and clean up RAM on Bash-installed systems, improving performance and stability.
### Credits
**Volkan Kücükbudak**