Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> Hmm. fd.h and fd.c test for F_NOCACHE, which is pretty closely
> related. Now I'm wondering why we actually need this in
> pg_config_manual.h at all. Who would turn it off at compile time, and
> why would they not be satisfied with setting relevant GUCs to 0?
+1 for not bothering with a pg_config_manual.h knob.
regards, tom lane