Same slave zonefiles load several times

[torben fjerdingstad]

A reload (bind-8.2.2-P5) takes many minutes now, on
ns-soa.darenet.dk.

A year ago, it only took about one second to get ready
for queries after a reload.

I often notice that the same zone file is loaded several
times. What is going on?

Here is a part of the log, during a single ndc reload, showing a
26Mb toplevel slave zonefile being loaded several times. Why?

Apr 19 14:39:37 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:41:03 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:41:03 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)
Apr 19 14:42:12 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:42:12 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)
Apr 19 14:43:23 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:43:23 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)
Apr 19 14:44:33 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:44:33 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)
Apr 19 14:45:42 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:45:42 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)
Apr 19 14:46:53 ns named[15598]: slave zone "dk" (IN) loaded (serial 2000041801)
Apr 19 14:46:53 ns named[15598]: suppressing duplicate notify ("dk" IN SOA)

Another example (a 28Kb zone file):

Apr 19 14:35:18 ns named[15598]: slave zone "sp2.uni-c.dk" (IN) loaded (serial 2076)
Apr 19 14:46:56 ns named[15598]: slave zone "sp2.uni-c.dk" (IN) loaded (serial 2078)
Apr 19 14:50:01 ns named[15598]: slave zone "sp2.uni-c.dk" (IN) loaded (serial 2079)
Apr 19 14:50:01 ns named[15598]: suppressing duplicate notify ("sp2.uni-c.dk" IN SOA)
Apr 19 14:55:18 ns named[15598]: slave zone "sp2.uni-c.dk" (IN) loaded (serial 2080)

I will be away until tuesday.

-- 
Med venlig hilsen / Regards 
Netdriftgruppen / Network Management Group
UNI-C          

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E-mail: torben.fjerdingstad at uni-c.dk       DK-2800 Lyngby