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Henrik Lutzmann 2024-12-25 22:39:00 +01:00
parent 816fffe837
commit 014dd81a01
4 changed files with 88 additions and 0 deletions
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40
wlin003_GamingPC/system/tweaks/32GB-SYSTEM.nix Normal file
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{ config, ... }:
# Control how and when data is written from memory to disk, which can have an impact on system performance and responsiveness.
# useful for optimizing memory usage, disk writeback behavior, network settings, and other low-level kernel behaviors.
{
boot.kernelModules = ["tcp_bbr"];
boot.kernel.sysctl = {
"net.ipv4.tcp_congestion_control" = "bbr";
"net.core.default_qdisc" = "fq";
"net.ipv4.tcp_fastopen" = "3";
#---------------------------------------------------------------------
# Network and memory-related optimizationss for 32GB
#---------------------------------------------------------------------
"kernel.sysrq" = 1; # Enable SysRQ for rebooting the machine properly if it freezes. [Source](https://oglo.dev/tutorials/sysrq/index.html)
"net.core.netdev_max_backlog" = 30000; # Help prevent packet loss during high traffic periods.
"net.core.rmem_default" = 262144; # Default socket receive buffer size, improve network performance & applications that use sockets. Adjusted for 32GB RAM.
"net.core.rmem_max" = 67108864; # Maximum socket receive buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 32GB RAM.
"net.core.wmem_default" = 262144; # Default socket send buffer size, improve network performance & applications that use sockets. Adjusted for 32GB RAM.
"net.core.wmem_max" = 67108864; # Maximum socket send buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 32GB RAM.
"net.ipv4.ipfrag_high_threshold" = 5242880; # Reduce the chances of fragmentation. Adjusted for SSD.
"net.ipv4.tcp_keepalive_intvl" = 10; # TCP keepalive interval between probes to detect if a connection is still alive.
"net.ipv4.tcp_keepalive_probes" = 5; # TCP keepalive probes to detect if a connection is still alive.
"net.ipv4.tcp_keepalive_time" = 60; # TCP keepalive interval in seconds to detect if a connection is still alive.
"vm.dirty_background_bytes" = 134217728; # 128 MB
"vm.dirty_bytes" = 402653184; # 384 MB
"vm.min_free_kbytes" = 65536; # Minimum free memory for safety (in KB), helping prevent memory exhaustion situations. Adjusted for 32GB RAM.
"vm.swappiness" = 5; # Adjust how aggressively the kernel swaps data from RAM to disk. Lower values prioritize keeping data in RAM. Adjusted for 32GB RAM.
"vm.vfs_cache_pressure" = 90; # Adjust vfs_cache_pressure (0-1000) to manage memory used for caching filesystem objects. Adjusted for 32GB RAM.
# Nobara Tweaks
"fs.aio-max-nr" = 1000000; # defines the maximum number of asynchronous I/O requests that can be in progress at a given time. 1048576
"fs.inotify.max_user_watches" = 65536; # sets the maximum number of file system watches, enhancing file system monitoring capabilities. Default: 8192 TWEAKED: 524288
"kernel.panic" = 5; # Reboot after 5 seconds on kernel panic Default: 0
"kernel.pid_max" = 131072; # allows a large number of processes and threads to be managed Default: 32768 TWEAKED: 4194304
};
}

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wlin003_GamingPC/system/tweaks/default.nix Normal file
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{ config, pkgs, ... }:
{
imports = [
#./4GB-SYSTEM.nix
#./8GB-SYSTEM.nix
#./16GB-SYSTEM.nix
./32GB-SYSTEM.nix
./ssd-tweaks.nix
];
}

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wlin003_GamingPC/system/tweaks/hdd-tweak.nix Normal file
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{ config, ... }:
# Control how and when data is written from memory to disk, which can have an impact on system performance and responsiveness.
# useful for optimizing memory usage, disk writeback behavior, network settings, and other low-level kernel behaviors.
{
boot.kernel.sysctl = {
#---------------------------------------------------------------------
# HDD tweaks: Adjust settings for an HDD to optimize performance.
#---------------------------------------------------------------------
"vm.dirty_background_ratio" = "10"; # Set the ratio of dirty memory at which background writeback starts (10% for HDD).
"vm.dirty_expire_centisecs" = "6000"; # Set the time at which dirty data is old enough to be eligible for writeout (6000 centiseconds for HDD).
"vm.dirty_ratio" = "20"; # Set the ratio of dirty memory at which a process is forced to write out dirty data (20% for HDD).
"vm.dirty_time" = "0"; # Disable dirty time accounting.
"vm.dirty_writeback_centisecs" = "1000"; # Set the interval between two consecutive background writeback passes (1000 centiseconds for HDD).
};
}

18
wlin003_GamingPC/system/tweaks/ssd-tweaks.nix Normal file
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{ config, ... }:
{
boot.kernel.sysctl = {
#---------------------------------------------------------------------
# SSD tweaks: Adjust settings for an SSD to optimize performance.
#---------------------------------------------------------------------
"vm.dirty_background_ratio" = "40"; # Set the ratio of dirty memory at which background writeback starts (5%). Adjusted for SSD.
"vm.dirty_expire_centisecs" = "3000"; # Set the time at which dirty data is old enough to be eligible for writeout (6000 centiseconds). Adjusted for SSD.
"vm.dirty_ratio" = "80"; # Set the ratio of dirty memory at which a process is forced to write out dirty data (10%). Adjusted for SSD.
"vm.dirty_time" = "0"; # Disable dirty time accounting.
"vm.dirty_writeback_centisecs" = "300"; # Set the interval between two consecutive background writeback passes (500 centiseconds)
};
services.fstrim.enable = true;
}