With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rttMonHTTPStatsBusies
Round Trip Time Monitor HTTP Stats Busies
1.3.6.1.4.1.9.9.42.1.3.4.1.19
The number of occasions when an HTTP operation could not be initiated because a previous HTTP operation has not been completed.
Back to CISCO-RTTMON-MIB MIB page.
IPHost Network monitor allows you to monitor rttMonHTTPStatsBusies on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.