Stephen Frost <[EMAIL PROTECTED]> writes: > * Greg Stark ([EMAIL PROTECTED]) wrote: >> However I was under the impression that 2.6 had moved beyond that problem. >> It would be very interesting to know if 2.6 still suffers from this.
> The tests on the em64t at my place were using 2.6.12. I had thought 2.6 > was better about this too, but I don't have another explanation for it. The 4-way Opteron I've been using at Red Hat is running 2.6.12-1.1398_FC4smp (Fedora Core 4 obviously). Red Hat in particular has been working hard in this area, and I thought that their recent kernels included NUMA fixes that weren't yet accepted upstream (at least not in the stable kernel branches). But it seems there's still a ways to go yet. It'd be real interesting to see comparable numbers from some non-Linux kernels, particularly commercial systems like Solaris. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match