The server allows for an unlimited number of connections by default, but is restricted by the file descriptor limit on the operating system. If needed, increase the file descriptor limit on the operating system with the following procedure.
If the operating system relies on
refer to the Linux operating system documentation for instructions on setting the
file descriptor limit.
Display the current hard limit of the system. The hard limit is the maximum
server limit that can be set without tuning the kernel parameters in the
/etc/sysctl.conffile. If the
fs.file-maxproperty is defined in the file, make sure its value is set to at least
65535. If the line does not exist, add the following to the end of the file:
fs.file-max = 65535
/etc/security/limits.conffile. If the file has lines that set the soft and hard limits for the number of file descriptors, make sure the values are set to
65535. If the lines are not present, add the following lines to the end of the file (before
#End of file). Insert a tab between the columns.
* soft nofile 65535
* hard nofile 65535
Reboot the system, and then use the
ulimitcommand to verify that the file descriptor limit is set to
65535with the following command:
Once the operating system limit is set, the number of file descriptors that the
server will use can be configured by either using a
NUM_FILE_DESCRIPTORS environment variable, or by creating a
config/num-file-descriptors file with a single line such as,
NUM_FILE_ DESCRIPTORS=12345. If these are not set, the default of
65535 is used. This is strictly optional if wanting to ensure that
the server shuts down safely prior to reaching the file descriptor limit.
RedHat 7 or later, modify the
20-nproc.conf file to set both the
open files and max user processes limits:
/etc/security/limits.d/20-nproc.conf Add or edit the following lines if they do not already exist: * soft nproc 65536 * soft nofile 65536 * hard nproc 65536 * hard nofile 65536 root soft nproc unlimited