The Ordinary Programmer is for coders who embrace simplicity and practicality. We share real-world tips, project stories, and tech insights for developers at every level. You don’t need to be a superstar — just a programmer who loves to learn and build helpful software.
The maximum number of connections limit refers to the limit of the maximum number of files (file descriptors) that the system can open, which is divided into global and per-process types:
Global
## The system's default maximum number of connections limit is 2147483647 $ sysctl kern.maxfiles kern.maxfiles: 2147483647 ## Set the system's maximum number of connections from 49152 to 1048600 $ sudo sysctl -w kern.maxfiles=1048600
Per-Process
# The default maximum number of connections per process is 61440 $ sysctl kern.maxfilesperproc kern.maxfilesperproc: 61440 # Set the per-process connection limit from 24576 to 1048576, the maximum number of connections per process must be less than or equal to the global connection limit $ sudo sysctl -w kern.maxfilesperproc=1048576
To make permanent changes, add the following content to /etc/sysctl.conf
kern.maxfiles=20480 kern.maxfilesperproc=18000
This file may need to be created manually.
Ulimit Command
$ ulimit -n 4864 #### Display the maximum number of files that the current shell can open, the default value is: 4864, this value is always…
The Ordinary Programmer is for coders who embrace simplicity and practicality. We share real-world tips, project stories, and tech insights for developers at every level. You don’t need to be a superstar — just a programmer who loves to learn and build helpful software.
