OEM agent increases disk I/O on Solaris 10

We have installed OEM agent on our Solaris 10 server but it is increasing the disk I/Os as it is trying to run "du" on all zonepaths continuously. Is it known? and any chance to avoid it? 

root@reg-glb07 # ptree 1026

1026  /usr/lib/cacao/lib/tools/launch -w /var/cacao/instances/scn-agent -L 16384 -A /

  1027  /usr/jdk/instances/jdk1.6.0/bin/java -Xmx150m -Xss192k -XX:MinHeapFreeRatio=10

    7750  /usr/bin/ctrun -l child -o pgrponly /opt/sun/n1gc/bin/vdiskadm-ofs -u xvm prop-

      7751  /bin/sh /opt/sun/n1gc/bin/vdiskadm-ofs -u xvm prop-get -p used-size /zones/reg-

        7753  awk -F  {print $1}

          7754  du -s -k /zones/reg-portal3