servfail on 9.6.1rc1

[Anatoly Pugachev]

Hello.

Installed bind-9.6.1rc1 for the "query-errors" category debugging.
Server is a usual recursive server on solaris 10 x86 with 4Gb of RAM.
Named was compiled with SunStudio 12 compiler suite as:
CFLAGS="-m32 -xarch=sse2" ./configure --prefix=/ --with-openssl=no
make

named.conf without any views defined, max-cache-size is set to 1500m
usual daily load shown with 'rndc status' is 1500 recursive clients.

$ prstat
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP       
 19567 bind      232M  228M sleep   59    0   0:12:08  19% named/7

Here's what I've got in the logs:

first query:

28-May-2009 05:57:40.578 query-errors: debug 1: client 213.33.171.242#1130: query failed (SERVFAIL) for 5.126.208.91.IN-ADDR.ARPA/IN/PTR at query.c:4619
28-May-2009 05:57:40.578 query-errors: debug 2: fetch completed at resolver.c:2908 for 5.126.208.91.IN-ADDR.ARPA/PTR in 0.000163: out of memory/success [domain:91.in-addr.arpa,referral:0,restart:1,qrysent:0,timeout:0,lame:0,neterr:0,badresp:0,adberr:0,findfail:0,valfail:0]

second same query coming to server resolving properly (NOERROR)

Can you please help me to investigate what is wrong?