Dateien nach "wlin003_GamingPC/system/tweaks" hochladen
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{ config, ... }:
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# Control how and when data is written from memory to disk, which can have an impact on system performance and responsiveness.
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# useful for optimizing memory usage, disk writeback behavior, network settings, and other low-level kernel behaviors.
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{
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boot.kernelModules = ["tcp_bbr"];
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boot.kernel.sysctl = {
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"net.ipv4.tcp_congestion_control" = "bbr";
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"net.core.default_qdisc" = "fq";
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"net.ipv4.tcp_fastopen" = "3";
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#---------------------------------------------------------------------
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# Network and memory-related optimizationss for desktop 16GB
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#---------------------------------------------------------------------
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"kernel.sysrq" = 1; # Enable SysRQ for rebooting the machine properly if it freezes. [Source](https://oglo.dev/tutorials/sysrq/index.html)
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"net.core.netdev_max_backlog" = 30000; # Help prevent packet loss during high traffic periods.
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"net.core.rmem_default" = 262144; # Default socket receive buffer size, improve network performance & applications that use sockets. Adjusted for 16GB RAM.
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"net.core.rmem_max" = 33554432; # Maximum socket receive buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 16GB RAM.
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"net.core.wmem_default" = 262144; # Default socket send buffer size, improve network performance & applications that use sockets. Adjusted for 16GB RAM.
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"net.core.wmem_max" = 33554432; # Maximum socket send buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 16GB RAM.
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"net.ipv4.ipfrag_high_threshold" = 5242880; # Reduce the chances of fragmentation. Adjusted for SSD.
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"net.ipv4.tcp_keepalive_intvl" = 30; # TCP keepalive interval between probes to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_probes" = 5; # TCP keepalive probes to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_time" = 300; # TCP keepalive interval in seconds to detect if a connection is still alive.
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"vm.dirty_background_bytes" = 134217728; # 128 MB
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"vm.dirty_bytes" = 402653184; # 384 MB
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"vm.min_free_kbytes" = 65536; # Minimum free memory for safety (in KB), helping prevent memory exhaustion situations. Adjusted for 16GB RAM.
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"vm.swappiness" = 10; # Adjust how aggressively the kernel swaps data from RAM to disk. Lower values prioritize keeping data in RAM. Adjusted for 16GB RAM.
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"vm.vfs_cache_pressure" = 90; # Adjust vfs_cache_pressure (0-1000) to manage memory used for caching filesystem objects. Adjusted for 16GB RAM.
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# Nobara Tweaks
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"fs.aio-max-nr" = 1000000; # defines the maximum number of asynchronous I/O requests that can be in progress at a given time. 1048576
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"fs.inotify.max_user_watches" = 65536; # sets the maximum number of file system watches, enhancing file system monitoring capabilities. Default: 8192 TWEAKED: 524288
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"kernel.panic" = 5; # Reboot after 5 seconds on kernel panic Default: 0
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"kernel.pid_max" = 131072; # allows a large number of processes and threads to be managed Default: 32768 TWEAKED: 4194304
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};
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}
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{ config, ... }:
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# Control how and when data is written from memory to disk, which can have an impact on system performance and responsiveness.
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# useful for optimizing memory usage, disk writeback behavior, network settings, and other low-level kernel behaviors.
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{
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boot.kernelModules = ["tcp_bbr"];
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boot.kernel.sysctl = {
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"net.ipv4.tcp_congestion_control" = "bbr";
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"net.core.default_qdisc" = "fq";
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"net.ipv4.tcp_fastopen" = "3";
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#---------------------------------------------------------------------
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# Network and memory-related optimizationss for 4GB
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#---------------------------------------------------------------------
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"kernel.sysrq" = 1; # Enable SysRQ for rebooting the machine properly if it freezes. [Source](https://oglo.dev/tutorials/sysrq/index.html)
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"net.core.netdev_max_backlog" = 30000; # Help prevent packet loss during high traffic periods.
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"net.core.rmem_default" = 131072; # Default socket receive buffer size, improving network performance and applications that use sockets.
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"net.core.rmem_max" = 16777216; # Maximum socket receive buffer size, determining the amount of data that can be buffered in memory for network operations.
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"net.core.wmem_default" = 131072; # Default socket send buffer size, improving network performance and applications that use sockets.
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"net.core.wmem_max" = 16777216; # Maximum socket send buffer size, determining the amount of data that can be buffered in memory for network operations.
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"net.ipv4.ipfrag_high_threshold" = 8388608; # Reduce the chances of fragmentation.
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"net.ipv4.tcp_keepalive_intvl" = 30; # TCP keepalive interval between probes to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_probes" = 5; # TCP keepalive probes to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_time" = 60; # TCP keepalive interval in seconds to detect if a connection is still alive.
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"vm.dirty_background_bytes" = 8388608; # Data (8 MB) modified in memory and needs to be written to disk. (Adjusted for 4GB RAM)
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"vm.dirty_bytes" = 25165824; # Data (24 MB) modified in memory and needs to be written to disk. (Adjusted for 4GB RAM)
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"vm.min_free_kbytes" = 32768; # Minimum free memory for safety (in KB), helping prevent memory exhaustion situations. (Adjusted for 4GB RAM)
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"vm.swappiness" = 20; # Adjust how aggressively the kernel swaps data from RAM to disk. Lower values prioritize keeping data in RAM. (Adjusted for 4GB RAM)
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"vm.vfs_cache_pressure" = 100; # Adjust vfs_cache_pressure (0-1000) to manage memory used for caching filesystem objects. (Adjusted for 4GB RAM)
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};
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}
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{ config, ... }:
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# Control how and when data is written from memory to disk, which can have an impact on system performance and responsiveness.
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# useful for optimizing memory usage, disk writeback behavior, network settings, and other low-level kernel behaviors.
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{
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boot.kernelModules = ["tcp_bbr"];
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boot.kernel.sysctl = {
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"net.ipv4.tcp_congestion_control" = "bbr";
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"net.core.default_qdisc" = "fq";
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"net.ipv4.tcp_fastopen" = "3";
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#---------------------------------------------------------------------
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# Network and memory-related optimizationss for 8GB
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#---------------------------------------------------------------------
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"kernel.sysrq" = 1; # Enable SysRQ for rebooting the machine properly if it freezes. [Source](https://oglo.dev/tutorials/sysrq/index.html)
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"net.core.netdev_max_backlog" = 30000; # Help prevent packet loss during high traffic periods.
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"net.core.rmem_default" = 262144; # Default socket receive buffer size, improve network performance & applications that use sockets. Adjusted for 8GB RAM.
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"net.core.rmem_max" = 33554432; # Maximum socket receive buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 8GB RAM.
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"net.core.wmem_default" = 262144; # Default socket send buffer size, improve network performance & applications that use sockets. Adjusted for 8GB RAM.
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"net.core.wmem_max" = 33554432; # Maximum socket send buffer size, determine the amount of data that can be buffered in memory for network operations. Adjusted for 8GB RAM.
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"net.ipv4.ipfrag_high_threshold" = 5242880; # Reduce the chances of fragmentation. Adjusted for SSD.
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"net.ipv4.tcp_keepalive_intvl" = 30; # TCP keepalive interval between probes to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_probes" = 5; # TCP keepalive probes to detect if a connection is still alive.
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#"net.ipv4.tcp_keepalive_time" = 300; # TCP keepalive interval in seconds to detect if a connection is still alive.
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"net.ipv4.tcp_keepalive_time" = "60"; # TCP keepalive interval in seconds to detect if a connection is still alive.
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"vm.dirty_background_bytes" = 134217728; # 128 MB
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"vm.dirty_bytes" = 402653184; # 384 MB
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"vm.min_free_kbytes" = 131072; # Minimum free memory for safety (in KB), helping prevent memory exhaustion situations. Adjusted for 8GB RAM.
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"vm.swappiness" = 10; # Adjust how aggressively the kernel swaps data from RAM to disk. Lower values prioritize keeping data in RAM. Adjusted for 8GB RAM.
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"vm.vfs_cache_pressure" = 90; # Adjust vfs_cache_pressure (0-1000) to manage memory used for caching filesystem objects. Adjusted for 8GB RAM.
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# Nobara Tweaks
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"fs.aio-max-nr" = 1000000; # defines the maximum number of asynchronous I/O requests that can be in progress at a given time. 1048576
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"fs.inotify.max_user_watches" = 65536; # sets the maximum number of file system watches, enhancing file system monitoring capabilities. Default: 8192 TWEAKED: 524288
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"kernel.panic" = 5; # Reboot after 5 seconds on kernel panic Default: 0
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"kernel.pid_max" = 131072; # allows a large number of processes and threads to be managed Default: 32768 TWEAKED: 4194304
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};
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}
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# -----------------------------------------------------------------
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# Summary of my configuration
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# -----------------------------------------------------------------
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# Network Performance Settings:
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# ----------------------------------------------
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# "net.core.rmem_default" = 16 MB
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# "net.core.rmem_max" = 16 MB
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# "net.core.wmem_default" = 16 MB
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# "net.core.wmem_max" = 16 MB
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# These settings define the default and maximum socket buffer sizes for receiving and sending data, improving network performance and benefiting applications that use sockets.
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# TCP Keepalive Settings:
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# ----------------------------------------------
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# "net.ipv4.tcp_keepalive_intvl" = 30 seconds
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# "net.ipv4.tcp_keepalive_probes" = 5 probes
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# "net.ipv4.tcp_keepalive_time" = 300 seconds
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# These settings configure TCP keepalive parameters, which are used to detect if a network connection is still alive.
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# Disk Write Behavior Settings:
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# ----------------------------------------------
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# "vm.dirty_background_bytes" = 16 MB
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# "vm.dirty_bytes" = 48 MB
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# These settings control how much modified data in memory needs to be written to disk. Lower values can lead to more frequent writes.
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# Memory Safety Setting:
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# ----------------------------------------------
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# "vm.min_free_kbytes" = 65,536 KB
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# This setting specifies the minimum amount of free memory in kilobytes, helping to prevent memory exhaustion situations.
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# Swappiness Setting:
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# ----------------------------------------------
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# "vm.swappiness" = 1
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# This setting determines how aggressively the kernel swaps data from RAM to disk. Lower values prioritize keeping data in RAM, suitable for systems with ample memory.
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# Cache Pressure Setting:
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# ----------------------------------------------
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# "vm.vfs_cache_pressure" = 50
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# This setting adjusts vfs_cache_pressure (0-1000), influencing how the kernel reclaims memory used for caching filesystem objects.
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# Customize these settings based on your system's requirements and performance goals, check below for extra info.
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# Values explained:
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# "vm.vfs_cache_pressure" = 50; Adjust vfs_cache_pressure (0-1000)
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# -----------------------------------------------------------------
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# 4GB RAM: 50 - 60 [ Lower values like 50 or 60 can be a good starting point for systems with 4GB of RAM to retain data in cache for improved file system access times ]
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# 8GB RAM: 60 - 80 [ Values around 60 to 80 are reasonable for 8GB of RAM, as you can still afford to keep more data in cache for better performance ]
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# 16GB RAM: 70 - 80 [ Lower values like 70 or 80 can be used to keep data in cache longer for systems with 16GB of RAM ]
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# 32GB RAM: 80 - 90 [ Values around 80 or 90 are suitable for systems with 32GB of RAM, allowing more data to stay in cache ]
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# 64GB RAM or More: 90 - 100 [ Lower values like 90 or 100 can minimize cache eviction for systems with very high memory, such as 64GB or more ]
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# Low Values (e.g., 10-100):
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# Situations where you have a lot of available RAM.
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# When you want to optimize filesystem access times by keeping more data in cache.
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# Systems with large file datasets that can benefit from a larger cache.
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# High Values (e.g., 500-1000):
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# Systems with limited RAM resources.
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# Servers or virtual machines where memory availability is critical.
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# When you want to ensure that cached memory is released more aggressively for other applications.
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# vm.swappiness = <Recommended Value>
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# ----------------------------------------------
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# Adjusts how aggressively the kernel swaps data from RAM to disk.
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# - For systems with 4GB RAM, consider a low value (1-10) to prioritize keeping data in RAM.
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# - For systems with 8GB RAM, use a moderate value (10-30) for a balance between RAM usage and swapping.
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# - For systems with 16GB to 28GB RAM, aim for a moderate value (10-30) to optimize performance.
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# - For systems with 32GB or more RAM, a slightly higher value (30-60) may be suitable.
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# Monitor system performance and adjust as needed based on your workload and available RAM.
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# CALCULATIONS: ( Schooling )
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# ----------------------------------------------
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# 1 MB (megabyte) = 1048576 bytes
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# To convert bytes to megabytes, divide the number of bytes by 1048576.
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# Here's how the calculations work for the values provided:
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# For "vm.dirty_background_bytes":
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# 16777216 bytes ÷ 1048576 bytes/MB = 16 MB
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# For "vm.dirty_bytes":
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# 50331648 bytes ÷ 1048576 bytes/MB = 48 MB
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# These calculations provide the approximate size in megabytes for the specified values.
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# The values "vm.dirty_background_bytes" and "vm.dirty_bytes" control how much dirty data (data that has been modified but not yet written to disk)
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# can accumulate in the system's cache before it's flushed to disk. Lowering these values, as done here, results in more frequent disk writes,
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# which can be useful when you need data to be quickly written to a USB drive.
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