Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > it certainly seems like it would be a good idea to have the 8k buffers
> > aligned on 4k offsets.
>
> Why? What mechanism do you expect would find that more efficient?
There was the idea that some OS's can swap the pages in from kernel into
the user space. I am not sure any one does that, but it would be
interesting to see. Also, a single shared buffer access would be a
single virtual memory lookup, rather than two lookups. Not sure, but it
would interesting to see.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
359-1001+ If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square,
Pennsylvania19073
