This is my sysctl.conf; DBCA works fine. Note that the individual SEM parameters can't be updated separately (as they are in the Oracle 10g Quick Install doc) but this is the same method used by Puschitz. #For Oracle 10g from Puschitz kernel.shmmax=2147483648 kernel.sem =250 32000 100 128 net.ipv4.ip_local_port_range = 1024 65000 fs.file-max = 65536 MLS