This property does not set the timeout for command execution, only the period of time for which to wait for response. I.e., if intervals between server responses are less than CommandTimeout, there is no time limit for command execution.
Zero value specifies that the wait time is unlimited.
The value of the CommandTimeout property is used in Direct mode. The OCI mode doesn't take into account the cmd.CommandTimeout, and the duration of command timeout is determined by Oracle client settings.