/* Offline, no. If your system is 24/7, then rebuild the indexes that you can online, if they need rebuilding, and only the ones that have to be rebuilt offline (because of LOB columns) get an offline rebuild.
*/
Ali,
If you have a downtime/offpeak please rebuild during ur downtime as doing it online is always more expensive than a offline rebuild.
If you dont have any downtime online rebuild is the only option.
Regards,
Raj