Job Management Partner 1/Performance Management - Agent Option for Virtual Machine Description, User's Guide and Reference

3.2.2 Effects when PFM - Manager stops

When PFM - Manager stops, this affects the entire Performance Management system.

PFM - Manager centrally manages the agent information of the PFM - Agent for Virtual Machine instances that are running at individual nodes. PFM - Manager also controls alarm event notification when PFM - Agent for Virtual Machine exceeds a threshold during performance monitoring, and it controls the execution of actions that are triggered by alarms. Consequently, if PFM - Manager stops, the entire Performance Management system is affected as described in the following table.

Table 3-1 Effects on PFM - Agent for Virtual Machine when PFM - Manager stops

Program name Effects Corrective action

PFM - Agent for Virtual Machine If PFM - Manager stops while PFM - Agent for Virtual Machine is active, the following actions take place:

Performance data collection continues.

Since any alarm event that occurs cannot be reported to PFM - Manager, alarm events are held for each alarm definition, and notification is retried until PFM - Manager starts. When the number of alarm events held exceeds 3, the oldest alarm event is overwritten. Furthermore, stopping PFM - Agent for Virtual Machine deletes the alarm events being held.

Alarm statuses that have already been reported to PFM - Manager are reset when PFM - Manager restarts. Then, after PFM - Manager checks the status of PFM - Agent for Virtual Machine, the alarm statuses are refreshed.

If you try to stop PFM - Agent for Virtual Machine, the operation will take a long time because it cannot be reported to PFM - Manager.

Start PFM - Manager.
The PFM - Agent for Virtual Machine instances that are running can be operated as is. However, alarms might not be reported as expected in some cases. Therefore, after PFM - Manager is restored, check the KAVE00024-I message, which is output to the common message log.

Before you decide on the corrective action to take, consider the effects that stoppage of PFM - Manager has. Also note that, in addition to trouble-induced stoppages, there are times that you need to stop PFM - Manager to change a configuration or perform maintenance tasks. Therefore, we recommend that you perform maintenance at a time when there will be little impact on system operations.

Program name	Effects	Corrective action
PFM - Agent for Virtual Machine	If PFM - Manager stops while PFM - Agent for Virtual Machine is active, the following actions take place: Performance data collection continues. Since any alarm event that occurs cannot be reported to PFM - Manager, alarm events are held for each alarm definition, and notification is retried until PFM - Manager starts. When the number of alarm events held exceeds 3, the oldest alarm event is overwritten. Furthermore, stopping PFM - Agent for Virtual Machine deletes the alarm events being held. Alarm statuses that have already been reported to PFM - Manager are reset when PFM - Manager restarts. Then, after PFM - Manager checks the status of PFM - Agent for Virtual Machine, the alarm statuses are refreshed. If you try to stop PFM - Agent for Virtual Machine, the operation will take a long time because it cannot be reported to PFM - Manager.	Start PFM - Manager. The PFM - Agent for Virtual Machine instances that are running can be operated as is. However, alarms might not be reported as expected in some cases. Therefore, after PFM - Manager is restored, check the KAVE00024-I message, which is output to the common message log.

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