7.5 Tuning state polling
The performance of state polling is affected by the following key variables:
The number of devices and interfaces to be polled
The type of polling configured
The frequency of polling each device
These variables are driven by your network management needs. If you are experiencing performance issues with status polling, consider the following configurations:
Because polling settings for individual nodes are controlled through their membership in node groups and interface groups, make sure that the groups contain nodes or interfaces with similar polling requirements.
If you are polling unconnected interfaces or interfaces that host IP addresses, check the configurations to make sure you are only polling the interfaces that are necessary. To maintain the most specific control and to select the smallest subset of interfaces to poll, enable these pollings on the Node Settings or Interface Settings form (not in Default Settings on the Monitoring Configuration form).
Remember that polling unconnected interfaces monitors all unconnected interfaces. To monitor only those unconnected interfaces that have IP addresses, enable polling of interfaces that host IP addresses.
Regardless of the monitoring configuration, status polling is dependent on network responsiveness and might be impacted by overall system performance. Although status polling with default polling intervals does not introduce much network load, if the performance of the network link between the server and the polled device is poor, status polling performance is poor. You can configure larger timeouts and a smaller number of retries to reduce the network load, but these configuration changes only go so far. Timely polling requires adequate network performance and sufficient system resources (CPU, memory).
Enabling or disabling component health monitoring has no effect on the timeliness of polling. It simply gathers additional MIB objects at the schedule time. However, disabling component health monitoring might reduce the amount of memory used by the State Poller.