Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> These changes have almost no negative impact on run time performance and
> can be implemented with minimum change. We can discuss whether the false
> sharing phenomena actually occurs, but the bottom line ISTM is that if
> we can avoid it ever occurring, for almost free, then why not?
No, you've put the burden of proof in the wrong place. You are
proposing a significant logical complication in the code for a
completely hypothetical improvement --- there is *no* evidence on
the table that cache contention within clog pages is even measurable.
Show us some experimental numbers first.
regards, tom lane