Just to clarify, the v490 is NOT a flat memory box. It turns out the memory accesses to the local board and a remote board have different times. The differences are pretty small, but they are not 0. MPO was enabled on that box to help and performance did improve a bit. ...Yes, David, thanks for correcting me. It is a Fireplane (interconnect) box. Poor oversight on my part. Gee, isn't NUMA fun? -- //www.freelists.org/webpage/oracle-l