Netbackup Master server /var file system full due to Core files genrated frequently

Hi All

Any one suggest /var file sytem genrated more core files and reached thresholds. Please suggest

# uname -a
SunOS "Masterserver"5.10 Generic_147440-19 sun4u sparc SUNW,Sun-Fire-V240
# bpgetconfig -g Master server
Master
Solaris, Solaris10
7.5.0.0.0.4
NetBackup
7.5
750000
/usr/openv/netbackup/bin
SunOS 5.10
#

-rw------- 1 root root 5688330 Jul 16 20:33 core_Masterserver_vxened.64bit_0_0_1405506786_9019
-rw------- 1 root root 5688330 Jul 16 20:33 core_Masterserver_vxened.64bit_0_0_1405506786_9020
-rw------- 1 root root 5688330 Jul 16 20:42 core_Masterserver_vxened.64bit_0_0_1405507337_10442
-rw------- 1 root root 5688330 Jul 16 20:44 core_Masterserver_vxened.64bit_0_0_1405507446_10736

Application : Netbackup
Zone : global

1 of NB_dbsrv running Testing for >=1
ERROR:  0 of bmrd running. Testing for >=1

I am expecting refresh will resolve this issue, It's currect or please suggest any other way to stope core files.

Thanks