Clemens Eisserer <linuxhi...@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

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