Introduced in release: 7.0.5
When a process is running out of available file descriptors and the
stressfdwait Base option is set, then the process is permitted to stop accepting new connections until the file descriptor shortage goes away. If this is turned off, the process will continue trying to accept connections until it fails. This is presently only implemented for the MMP and is on by default. As stress fd wait is a new feature, it may be helpful to disable the feature temporarily if it is causing an unexpected problem.
The default value is: 1