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Active Directory agent - DNS reponse time

Technote (FAQ)


How is DNS Response Time attribute calculated by the ITCAM monitoring agent for Microsoft Active Directory?


Monitoring agent for Microsoft Active Directory reports DNS response time in milliseconds of time taken by DNS Server to respond to a single query. The agent derives this value from the DNS server performance counter (Total Response Sent/sec).

Performance counter "Total Response Sent/sec" is the average number of responses sent by the DNS server in each second.

The following formula is used by the agent to calculate DNS Response Time:

DNS Response Time (in milliseconds)= (1000 + rounding factor)/ (Total Response Sent/sec)

1. Calculate rounding factor as 1/2 the Total Response Sent/sec.
2. Add this rounding factor to 1000 (1 second is equal to 1000 milliseconds) and divide by performance counter "Total Response Sent/sec".

Document information

More support for: Tivoli Composite Application Manager for Microsoft Applications
Active Directory Agent - 5724C71AO

Software version: 6.3.0, 6.3.1

Operating system(s): Windows

Reference #: 1622622

Modified date: 26 November 2014

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