The upper limit of the number of Linux file handles is one of the important factors of the operating system

The upper limit of the number of Linux file handles is an important resource of the operating system in the file system. A file handle refers to a series of elements maintained by the operating system on a file, allowing processes to access files by constructing relationships between files. The upper limit on the number of file handles limits the maximum number of files that a process can handle at the same time.

The default value of the upper limit of Linux file handles depends on the file system used, but usually the default value is set at 2048 or 4096. This value can be adjusted by changing the upper limit setting option for the number of file handles in /etc/sysctl.conf:

“`shell

fs.file-max=65536

<br>在系统重启后，指定的文件句柄数上限才会生效，此前可以通过查询 /proc/sys/fs/file-max 文件获得实际设置值。<br>此外，开发者可以通过在代码中设置文件句柄数量上限来进行文件句柄数量的控制。以Cython 代码片段为例，可以使用rlimit()函数来设置RLIMIT_NOFILE系统资源限制参数，设置文件句柄最大数量上限：<br>```pythonimport resource<br>res_name = resource.RLIMIT_NOFILEvalue = 65536<br>resource.setrlimit(res_name, (value, value))

In general, the upper limit on the number of Linux file handles is one of the important incentives for Linux system file management. It can adjust the upper limit of the number of file handles through the configuration parameters in /etc/sysctl.conflinux file handlelinux multi-thread programming, or through code control during application developmentlinux File handle for better file system management effectiveness.

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