The value of the parameter (a decimal integer)
represents the number of minutes of inactivity before a connection
is considered dead, and it is disconnected. The deadtime only takes
effect if the number of open files is zero.
This is useful to stop a server's resources being
exhausted by a large number of inactive connections.
Most clients have an auto-reconnect feature when a
connection is broken so in most cases this parameter should be
transparent to users.
Using this parameter with a timeout of a few minutes
is recommended for most systems.
A deadtime of zero indicates that no auto-disconnection
should be performed.
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