While the license issue is equally important, I want to point out that in "Oracle9i Release 2 Database Architecture on Windows An Oracle Technical White Paper April 2003" Oracle does state they support processor affinity: "Much like the ORACLE_PRIORITY setting, the ORACLE_AFFINITY registry setting allows a database administrator to assign the entire Oracle process or individual threads in that process to particular CPUs or groups of CPUs in the system." You can search for "ORACLE_AFFINITY" on tahiti.oracle.com for official documentation. The registry setting exists for 9i, 10g and 11g. Yong Huang > Is it possible to restrict Oracle to one of the two processors. We would > be running Oracle 10gR2 on Windows server 2003. Essentially the desire is > to use one processor for Oracle and the other for windows. -- //www.freelists.org/webpage/oracle-l