Hi, We've got a SAP system running on RAC and SAP are recommending letting it default to 0. I'm not comfortable with this as recovery from an instance or total database crash could take a while (many minutes). I've done some research via google and metalink and see that there's an underscore parameter _FAST_START_INSTANCE_RECOVERY_TARGET which is mentioned in some places as being the way to go on RAC. I've not been able to come to any firm conclusions myself so any advice, experiences much appreciated. Environment is: 10.2.0.2 64 bit Windows 2003 64 bit 6 nodes Thanks, Chris Chris Dunscombe Christallize Ltd www.christallize.com Tel: 01903-714200 Mob: 07906-941850 Email: chris.dunscombe@xxxxxxxxxxxxxxxx -- //www.freelists.org/webpage/oracle-l