Turn off ncache?

[Lars-Johan Liman]

In an educational lab environment, I want to turn off negative
caching, to make changes to the zone files propagate infinitely
quick.

In named.conf (8.2.2-P5) one can set
  max-ncache-ttl  nnn;
to limit the ncache retention time.

Setting the time (nnn) to "2" (seconds) works well, and is adequate
for all practical purposes.

Setting it to "0" seems to have no effect, and does not turn off
ncache, as one would expect.

Why?

				Best regards,
				  /Liman
#----------------------------------------------------------------------
# Lars-Johan Liman, Systems Specialist	! E-mail: liman at sunet.se
# KTH Network Operations Centre         ! HTTP  : //www.sunet.se/~liman
# Royal Institute of Technology, Sweden	! Voice : Int +46 8 - 790 65 60
#----------------------------------------------------------------------