Auto Extend Off - System Impact and procedure

Hi Team,

We have done the DB Reorg and noticed that continuos freespace was not enough because of the auto allocation settings..

Could you pls let us know the system impact if we turn off the auto extend in Production system..

We are using SAPDBA , Oracle 8i ,SAP 4.6c..

Pls provide ur valuable suggestions..

If possible pls let us know the procedure to turn off the auto extend..

Regds,

Satyanarayana N.