Re: 8.0.X and the ARC patent

Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Tom Lane wrote:
>> Still to be determined: what we lose in extra I/O from the presumably
>> less efficient cache management; also what sort of slowdown occurs on
>> a single-CPU machine that isn't going to get any benefit from the
>> increased amount of lock management.  But it looks promising.

> Yea, that was one of my questions --- the new buffer locking helps SMP,
> but how much does it hurt single-cpu machines?

So far I've not been able to measure any consistent difference, but you
know how much I trust pgbench ;-).  I hope that Mark Wong can give us
some results on the OSDL setup soon.
        regards, tom lane