We have heavily loaded Brocade MLXe routers, and polling time is very high for these devices. The same is seen for few Arista switches (at longer distances) as well.

This certainly is related to IF-MIB, trying to poll lots of data statistics for all interfaces, resulting in ports.inc.php module run time of ~150sec+. Ideally, we want to reduce this polling time to <60sec. 

time /usr/bin/snmpbulkwalk -Cr60 -v2c -c 'jtv' -OQUs -m IF-MIB -M /home/jtv/observium//mibs/rfc:/home/jtv/observium//mibs/net-snmp 'udp':'br02.lhr02':'161' ifEntry

real    0m57.616s

user    0m0.044s

sys     0m0.012s

time /usr/bin/snmpbulkwalk -Cr60 -v2c -c 'jtv' -OQUs -m IF-MIB -M /home/jtv/observium//mibs/rfc:/home/jtv/observium//mibs/net-snmp 'udp':'br02.lhr02':'161' ifXEntry

real    0m52.763s

user    0m0.032s

sys     0m0.024s

We do not care about some of the interface statistics, for example, mtu, speed, duplex, promiscuous mode, trunk, vlan, etc. We only want interface traffic in/out and error statistics. 

Is there a way to selectively modify any discovery/polling/MIB files, and only keep the statistics we are interested in?