Poll intervals
The number of poll intervals affects the response times. A guideline is provided to help with choosing the appropriate interval.
You define the poll interval when you create profile elements. Use the following formula as a guide:
minimum poll interval = number of profile elements × average response time / MaxCCA
Response times in LAN monitoring environments
In LAN monitoring environments, server tests run over high-speed networks. Therefore the response times of services are low, typically less than one second.
The poll interval is also affected by data logging functions that involve a higher number of disk access operations. If you use monitors as data sources for only IBM Tivoli Netcool/OMNIbus and IBM Tivoli Monitoring, and you do not use the datalogs as storage for simple reporting or archiving results, then monitor data logging is not necessary and you can run the monitors without data logging. This condition permits shorter polling intervals of up to one half of the value indicated by the polling interval formula.
Response times in remote monitoring environments
In remote monitoring environments, where service tests run over a WAN or an Internet connection, the response times are less predictable, and it is the network response time, instead of monitor performance, that limits the poll interval. Use polling intervals that allow enough time for responses to be received before the next test starts.