This object sets, in seconds from 10 to 65535, how often the sampled variable is compared against the rising and falling thresholds, defaulting to 1800, and cannot be modified once the entry's status is valid; for delta sampling it should be set short enough that the counter can't wrap by more than 2^31-1 within one interval. Admins tune this to balance alerting responsiveness against monitoring overhead. Setting this to 300 checks the monitored variable against its thresholds every 5 minutes instead of the default 30 minutes.