Summary of Ubuntu system kernel parameter optimization principles and practical experience and ubuntu20 kernel

php editor Xigua has summarized an experience summary on Ubuntu system kernel parameter optimization for everyone. This article will share the principles and practical experience about the Ubuntu20 kernel to help readers optimize system performance and improve system stability and response speed. By adjusting and optimizing the kernel parameters, readers can better adapt to their own system needs, improve the operating efficiency of the system, and provide a better environment for work and study. Let’s learn about these experiences together!

When optimizing the kernel parameters of the Ubuntu system, there are some basic principles that need to be followed:

1. Understand the meaning of the kernel parameters: When adjusting the kernel parameters Before doing this, you must first understand the meaning and function of each parameter so that you can make reasonable adjustments according to actual needs.

2. Adjust according to specific needs: Different application scenarios and hardware configurations may require different kernel parameter settings. Adjust according to actual needs to achieve optimal performance and stability.

3. Make adjustments carefully: Adjusting kernel parameters may have an important impact on the system, so you must be careful when making adjustments. It is best to test first to ensure that the adjusted parameters can achieve the expected results. .

In practice, the following is a summary of some common Ubuntu system kernel parameter optimization experiences:

1. Adjust file descriptor limits: By modifying the /etc/security/limits.conf file, you can Increase the system's file descriptor limit, which is very important for some applications that require a large number of file operations.

2. Adjust TCP network parameters: By modifying the files in the /sys/ directory, you can adjust the TCP network parameters to improve network performance. By modifying the /sys/net/ipv4/tcp_fin_timeout parameters, you can adjust the TCP connection overtime time.

3. Adjust memory parameters: By modifying the files in the /sys/ directory, you can adjust the memory parameters to improve the system's memory utilization. By modifying the /sys/vm/swappiness parameter, you can adjust the page replacement behavior. .

4. Adjust the CPU scheduling strategy: By modifying the files in the /sys/ directory, you can adjust the CPU scheduling strategy to improve the system's responsiveness. You can adjust the kernel's scheduling by modifying the /sys/kernel/sched_latency_ns parameter. Delay.

For the latest Ubuntu20 version, the following are some applicable kernel parameter optimization suggestions:

1. Adjust virtual memory parameters: You can adjust virtual memory parameters by modifying the files in the /sys/ directory , to improve system performance, the ratio of dirty pages can be adjusted by modifying the /sys/vm/dirty_ratio parameter.

2. Adjust the disk scheduling policy: By modifying the files in the /sys/ directory, you can adjust the disk scheduling policy to improve the read and write performance of the disk. By modifying the /sys/block/sda/queue/scheduler parameter The disk scheduling algorithm can be adjusted.

3. Adjust network parameters: By modifying the files in the /sys/ directory, you can adjust network parameters to improve network performance. You can adjust the size of the TCP SYN queue by modifying the /sys/net/ipv4/tcp_max_syn_backlog parameter. .

Let me share with you a little LINUX knowledge: The /etc directory in Linux is used to store system configuration files, including network configuration, user configuration, service configuration, etc. In the Ubuntu system, the /etc directory is very Important, it has a significant impact on the operation and configuration of the system.

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