Clemens Eisserer <linuxhippy@gmail.com> writes:
> Is there anything I can do to lower the size of those two files?
Well, if you were using 8.4 you could fool with configure's
--with-wal-segsize option. Since you're not, look into
src/include/pg_config_manual.h. In either case, expect to do a
full recompile and initdb after changing it.
> What are reasonable values for smaller databases, and if it can be
> changed, what impact would it have on the system?
I don't believe any serious effort has been made to quantify that;
the knob is there but you're on your own to figure out how hard to
twist it.
regards, tom lane