6.2.2 Effects of PFM - Manager stopping

PFM - Manager stopping affects the entire Performance Management system.

PFM - Manager provides centralized management of the agent information for PFM - Agent for Service Response that is running at all the nodes. It also controls both alarm event notifications when thresholds are exceeded during performance monitoring by PFM - Agent for Service Response, and the execution of actions based on alarm events. Therefore, when PFM - Manager is stopped, the Performance Management system is affected as described in the following table.

Table 6‒1: Effects of PFM - Manager stopping on PFM - Agent for Service Response
Program	Effects	Action
PFM - Agent for Service Response	If PFM - Manager is stopped while PFM - Agent for Service Response is running, the following occurs: Collection of performance data continues. Because alarm events cannot be reported to PFM - Manager, the alarm events for each alarm definition are saved, and notification for each event is reattempted until PFM - Manager starts. When the number of saved alarm events exceeds 3, the oldest alarm event is overwritten. If PFM - Agent for Service Response stops, the saved alarm events are deleted. Notifications of alarm status already sent to PFM - Manager are reset when PFM - Manager restarts. Alarm statuses are refreshed once PFM - Manager has checked the status of PFM - Agent for Service Response. An attempt to stop PFM - Agent for Service Response takes time because notification of this event cannot be sent to PFM - Manager.	Start PFM - Manager. An active PFM - Agent for Service Response can continue to operate. Because alarms may not be notified as expected, after PFM - Manager has been recovered, check the `KAVE00024-I` messages that have been output to PFM - Agent's common message log.

You should evaluate your operating procedures, taking into account the effects of PFM - Manager stopping. Apart from system crashes, events such as a configuration change or maintenance may require stopping of PFM - Manager. You should stop for maintenance purposes only when the stopping will have the least effects on operations.

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