slow IXFR updates

[Rainer Duffner]

Hi,

I run a FreeBSD6.0 BIND 9.3.1 in a jail as a secondary-only for various 
customers.
Now, one of these customers complains that the updates take very long 
(1-3 hours).

What could be that reason for that?
What would I need to change in the configuration?
The only thing I did to the configuration is to disable recursion and 
remove or comment out the various examples.
The host is running without a firewall currently, so that should not be 
a problem.

Any ideas?


Best regards,
Rainer