On Mon, 2011-12-19 at 07:50 -0500, Robert Haas wrote:
> I
> think it would be regrettable if everyone had to give up 4 bytes per
> page because some people want checksums.
I can understand that some people might not want the CPU expense of
calculating CRCs; or the upgrade expense to convert to new pages; but do
you think 4 bytes out of 8192 is a real concern?
(Aside: it would be MAXALIGNed anyway, so probably more like 8 bytes.)
I was thinking we'd go in the other direction: expanding the header
would take so much effort, why not expand it a little more to give some
breathing room for the future?
Regards,Jeff Davis