On Sun, Dec 13, 2009 at 10:00 PM, Takahiro Itagaki <itagaki.takah...@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 -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
