4.5.5 When the suppression of monitoring of a large number of events ends

After having started the suppression of monitoring of a large number of events, JP1/IM - Manager ends monitoring suppression when the number of suppression-target events acquired is kept lower than the threshold for a specified period (end monitoring period). The end monitoring period and threshold are specified on the Options page of the Repeated Event Condition Settings window.

JP1/IM - Manager determines whether to end suppression of monitoring of a large number of events when it receives an event from the event service.

JP1/IM - Manager determines whether to end suppressing repeated-event display according to each repeated event condition.

The following describes when the suppression of monitoring of a large number of events that meet repeated event condition α ends if the number of occurring events is kept lower than the threshold for an end monitoring period. Assume that, in repeated event condition α, the occurrence monitoring period is 2 seconds, the number of occurring events is 5, and the end monitoring period is 300 seconds (5 minutes).

Figure 4‒62: Occurrence of a large number of events (1)

Assume that a large number of events that meet repeated event condition α have occurred as shown in Figure 4-62.

JP1/IM - Manager determines whether the occurrence of a large number of events has ended on the basis of the arrival time (B.ARRIVEDTIME) of the events occurring in large numbers. JP1/IM - Manager determines that the occurrence of a large number of events has ended when the following condition is satisfied:

• Condition for determining whether the occurrence of a large number of events has ended

  Arrival-time-of-the-event-acquired-from-the-event-service - last-one-of-the-events-occurring-in-large-numbers-that-caused-the-number-of-occurring-events-to-reach-or-exceed-the-threshold ≥ end-monitoring-period

Among the events that have occurred as shown in Figure 4-62, the latest event acquired from the event service is event M, which arrived at second 301. The figure below graphically shows the number of occurring events per occurrence monitoring period and threshold. For details about how to read the graph of the number of occurring events per occurrence monitoring period and threshold, see 4.5.4 When the suppression of monitoring of a large number of events starts.

Figure 4‒63: Graph of the number of events per occurrence monitoring period (3)

This graph shows that event G is the last one of the events occurring in large numbers that caused the number of occurring events to reach or exceed the threshold, and its arrival time is second 2. The end monitoring period is from second 1 to second 301 as shown in Figure 4-63. The following expression represents the relationships among the arrival time of event G, arrival time of event M, and the end monitoring time specified in repeated event condition α:

Arrival time of event M (second 301) - arrival time of event G (second 2) < end monitoring time specified in repeated event condition α (300 seconds)

The difference between the arrival time of event M and that of event G is less than the length of end monitoring period. Therefore, the suppression of monitoring of a large number of events does not end when event M is acquired.

Assume that JP1 events have occurred as shown in the following figure after a large number of events that meet repeated event condition α had occurred as shown in Figure 4-62.

Figure 4‒64: Occurrence of a large number of events (2)

When events have occurred as shown in Figure 4-64, event N, arriving at second 302, is the latest event acquired from the event service. The following figure graphically shows the number of occurring events per occurrence monitoring period and threshold at the time of event N.

Figure 4‒65: Graph of the number of events per occurrence monitoring period (4)

This graph shows that event G is the last one of the events occurring in large numbers that caused the number of occurring events to reach or exceed the threshold, and its arrival time is second 2. The end monitoring period is from second 2 to second 302 as shown in Figure 4-65. The following expression represents the relationships among the arrival time of event G, arrival time of event N, and the end monitoring time specified in repeated event condition α:

Arrival time of event N (second 302) - arrival time of event G (second 2) ≥ end monitoring time specified in repeated event condition α (300 seconds)

Because the difference between the arrival time of event N and that of event G is more than the length of end monitoring period, the suppression of monitoring of a large number of events ends.

The following figure shows the events occurring in large numbers whose monitoring is suppressed and those whose monitoring is not suppressed when events have occurred as shown in Figure 4-65.

Figure 4‒66: Events occurring in large numbers whose monitoring is suppressed and those whose monitoring is not suppressed

The suppression of monitoring ends at second 302. Therefore, monitoring suppression does not apply to event N and subsequently occurring events that meet the event conditions in repeated event condition α.

For the information that is displayed by JP1/IM - View when the suppression of monitoring of a large number of events, see 4.4.6 Event list display during the suppression of repeated-event display.

Ending monitoring suppression except when the number of acquired events occurring in large numbers is kept lower than the threshold for a specified period (end monitoring period)

The suppression of monitoring of a large number of events ends also in the following cases:

• When JP1/IM - Manager stops

  If the suppression of monitoring of a large number of events ends because JP1/IM - Manager stops, no suppression end event is issued even when issuance of the notification of the end of monitoring suppression has been set. For details about the suppression end event, see 4.5.10 Issuing events associated with the suppression of monitoring of a large number of events.

• When a repeated event condition is changed or deleted

  In this case, JP1/IM - Manager ends suppressing the monitoring of only the consolidation events that meet specific repeated event conditions. The specific repeated event conditions are those which were marked with the editing icon when they were updated in the List of Repeated Event Conditions window or those which have been deleted.

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