Using the Event Monitoring Service (November 1999)

Chapter 5 61
Monitoring ServiceGuard Package Dependencies
Figure 5-5 Resource Parameters Screen
NOTE Make sure you always select UP in the Resources Up Values field.
ServiceGuard creates an EMS request that sends an event if the
Resources Up Value field is not equal to the UP value.
If you select only UP, the package fails over if the value is anything
but UP. In this example, if you select UP and PVG-UP, the package fails
over if the pv_summary value is not equal to UP or PVG_UP; in other
words, if pv_summary is SUSPECT or DOWN.
The polling interval determines the maximum amount of elapsed
time before the monitor knows about a change in resource status. For
critical resources, you may want to set a short polling interval, such
as 30 seconds, but this could adversely affect system performance.
With longer polling intervals you gain system performance, but you
risk not detecting problems soon enough.