On Sun, Dec 13, 2009 at 10:00 PM, Takahiro Itagaki
<itagaki.takahiro@oss.ntt.co.jp> wrote:
>> Two other thoughts:
>>
>> 1. It doesn't appear that there is any provision to ever zero
>> pgBufferUsage. Shouldn't we do this, say, once per explain, just to
>> avoid the possibility of overflowing the counters?
>
> I think the overflowing will not be a problem because we only use
> the differences of values. The delta is always corrent unless we use
> 2^32 buffer accesses during one execution of a node.
Hmm... you might be right. I'm not savvy enough to know whether there
are any portability concerns here.
Anyone else know?
...Robert