If there is already a value for the parameter name in the stune(F) file, you are normally asked to confirm the change with the following message:
Tunable Parameter name is currently set to old_value. Is it OK to change it to value? (y/n)If you answer ``y'', idtune makes the change. Otherwise, the tunable parameter is not changed, and idtune displays the following message:
name left at old_value.If system tunable parameters are being modified as part of a device driver or application add-on package, it may be desirable for an add-on package Install script to suppress the question prompt. This can be done using one of the following options:
The -min and -max options allow you to define new minimum (new_min) and maximum (new_max) values for the parameter name in mtune. If the -m option causes idtune to fail to update the existing value in stune, it still writes the new minimum or maximum values to mtune.
In order for any changes in the values of kernel parameters made by idtune to become effective, you must relink the UNIX system kernel and reboot the system.
iddeftune is normally run at installation time to set certain kernel parameters to values that are appropriate to a system with 32MB or more of memory.
You should also run iddeftune if you increase the amount of memory in a system from less than 32MB.
In order for any changes in the values of kernel parameters made by iddeftune to become effective, you must relink the UNIX system kernel and reboot the system.