What's the matter with Linux memory missing?

It is found that the memory is missing in Linux. The reasons are: 1. There is a memory leak in the application, causing the memory to be continuously occupied and cannot be released; 2. The cache and buffer are occupied too much; 3. Other processes are A large amount of memory resources are used in the system, resulting in a reduction in the observed available memory; 4. There may be problems with the kernel or driver, causing abnormal memory management.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

If you find that memory is missing in Linux, it may be due to one of the following reasons:

1. Memory leak: There is a memory leak in the application, causing the memory to be continuously occupied. Cannot be released. This may be caused by programming errors, resources not being released correctly, or circular references. You can use tools like top or htop to monitor your system's memory usage, see which process is taking up too much memory, and debug and fix that process.

2. Excessive cache and buffer usage: Linux uses a portion of memory to cache file system and disk I/O operations to improve performance. These caches are usually released automatically, but in some cases they can occupy a large amount of memory, resulting in less available memory. You can use the command free -h to check the memory usage of the system to ensure that the memory occupied by caches and buffers is not a real memory leak.

3. Memory resources are occupied by other processes: It is possible that other processes are using a large amount of memory resources in the system, resulting in a reduction in the available memory you observe. You can use the command top or htop to view the memory usage of each process in the system and determine whether any process is taking up too much memory.

4. Kernel or driver issues: In some cases, there may be a problem with the kernel or driver that causes memory management abnormalities. This may require upgrading or repairing the kernel version, or updating related drivers.

If you find that the system’s available memory continues to decrease or the memory usage is too high, you can try the following solutions:

• Restart the system: Yes Sometimes, restarting can release occupied memory and clear caches and buffers.

• Check Applications: Check running applications for memory leaks or other resource management issues and make necessary fixes.

• Update system and software: Make sure your system and related software packages are up to date to fix known issues and vulnerabilities.

• Adjust kernel parameters: Depending on the actual situation, some kernel parameters may need to be adjusted to optimize memory management and resource allocation. This requires detailed research and configuration on a case-by-case basis.

If the problem still exists, it is recommended to provide more detailed information, such as system version, related error information, running processes, etc., for further analysis and help.

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