Re: I/O on select count(*)

[PFC <lists@xxxxxxxxxx>]

> The real question in my mind is why this turns into a bottleneck before  
> the similar task of cleaning the 16MB XLOG segment does.  I expected  
> that one would need to be cracked before the CLOG switch time could  
> possibly be an issue, but reports from the field seem to suggest  
> otherwise.

	Hm, on current CPUs zeroing 8kB of RAM should take less than 2 us... now  
if it has to be written to disk, that's another story !