Is the distributed lock timeout value in oracle modifiable

Question

In this link here

it says Modifiable:No but range of values is 1 to unlimited. So if it is not modifiable, what does it mean to have a range?

Answer 1

The section modifiable indicates whether the value of a parameter can be changed dynamically(take effect immediately) for a current session(for a duration of a session) using alter session statement or for all sessions, using alter system statement . If parameter is not modifiable its value can be changed in the server parameter file only (scope=spfile option only) and take effect after an instance is restarted.