Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> I don't see the gain of having a file called pg_xlog vs. using GUC.
Well, the point is to have a safety interlock --- but I like Jan's
idea of using matching identification files in both directories.
With that, a GUC variable seems just fine.
regards, tom lane