With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cDnsQueryIntMemCacheWrites
Cisco Dns Query Interval Memory Cache Writes
1.3.6.1.4.1.9.9.405.1.3.11
Number of mem-cache writes during reporting interval.
Back to CISCO-DNS-SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor cDnsQueryIntMemCacheWrites on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.