Performance Optimizations

MocaccinoOS Performance Optimizations

MocaccinoOS includes optimized system and network settings to improve performance. These tweaks enhance networking, memory management, and filesystem efficiency.

• Some settings are enabled by default.
• Additional examples are provided for users who want further customization.
• Changes persist after reboot but are overwritten on system updates.
• To make changes permanent, users must create /etc/sysctl.d/99-custom.conf.

Default Optimizations (Already Enabled)

Network Performance Tweaks

FQ (Fair Queuing) for reduced bufferbloat:

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net.core.default_qdisc=fq

BBR congestion control for low latency:

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net.ipv4.tcp_congestion_control=bbr

Memory Management Optimizations

Reduce swap usage for better responsiveness:

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vm.swappiness=10

Prevent stutters by optimizing disk writeback:

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vm.dirty_ratio=20
vm.dirty_background_ratio=5

Reduce VFS cache pressure for better I/O performance:

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vm.vfs_cache_pressure=50

Filesystem & Process Optimizations

Improve file monitoring (for IDEs, Docker, game engines):

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fs.inotify.max_user_watches=524288
fs.inotify.max_user_instances=1024

Customizing TCP Buffer Sizes

MocaccinoOS provides example settings for different workloads.

Low Latency (Gaming, Video Calls)

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net.core.rmem_max=4194304
net.core.wmem_max=4194304
net.ipv4.tcp_rmem=4096 87380 4194304
net.ipv4.tcp_wmem=4096 16384 4194304

High Bandwidth (File Transfers, Streaming)

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net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 65536 16777216

Copy the settings into /etc/sysctl.d/99-custom.conf to make them permanent.

Adjusting vm.max_map_count (Advanced Users)

The default vm.max_map_count=65530 works for most users. Some applications (Elasticsearch, game engines, AI tools) may need a higher limit.

Example: Increase to 262144 for database workloads:

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echo "vm.max_map_count=262144" >> /etc/sysctl.d/99-custom.conf
sysctl --system

Recommended Values:

• Default Linux: 65530
• Elasticsearch & Databases: 262144
• High-performance workloads: 1048576+

The game Dayz requires 1048576¹

How to Apply Changes

After modifying /etc/sysctl.d/99-custom.conf, apply changes immediately:

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sudo sysctl --system

To verify a setting:

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sysctl net.ipv4.tcp_congestion_control

FAQ

Q: What happens if I edit /usr/lib/sysctl.d/70-mocaccino.conf?

⚠ Do NOT edit this file! It will be overwritten when the system updates.
Instead, create /etc/sysctl.d/99-custom.conf.

Q: How do I check my current TCP congestion control?

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sysctl net.ipv4.tcp_congestion_control

Q: How do I restore the default settings?

Simply delete your /etc/sysctl.d/99-custom.conf file and run:

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sudo sysctl --system

Summary

✔ MocaccinoOS includes performance optimizations by default
✔ Users can test additional tweaks by uncommenting settings in 70-mocaccino.conf
✔ To make changes permanent, users must use /etc/sysctl.d/99-custom.conf