Volume 9: Managing the Blue Coat SG Appliance
About the Health Monitoring Metric Types
The SG appliance monitors the following types of health metrics:
❐Hardware
❐Environmental
❐ADN
❐System resource
❐Licensing metrics
The system resource and licensing thresholds are
The hardware, environmental, and ADN metrics are not configurable and are preset to optimal values. For example, on some platforms, a Warning is triggered when the CPU temperature reaches 55 degrees Celsius.
These health monitoring metrics are logically grouped as General, Licensing, or Status metrics.
About Health Monitoring
Health Monitoring allows you to set notification thresholds on various internal metrics that track the health of a monitored system or device. Each metric has a value and a state.
The value is obtained by periodically measuring the monitored system or device. In some cases, the value is a percentage or a temperature measurement; in other cases, it is a status like "Disk Present" or "Awaiting Approval".
The state indicates the severity of the metric as a health issue:
❐
❐
❐
The current state of a metric is determined by the relationship between the value and its monitoring thresholds. The Warning and Critical states have thresholds, and each threshold has a corresponding interval.
All metrics begin in the OK state. If the value crosses the Warning threshold and remains there for the threshold's specified interval, the metric transitions to the Warning state. Similarly, if the Critical threshold is exceeded for the specified interval, the metric transitions to the Critical state. Later (for example, if the problem is resolved), the value may drop back down below the Warning threshold. If the value stays below the Warning threshold longer than the specified interval, the state returns to OK.
Every time the state changes, a notification occurs. If the value fluctuates above and below a threshold, no state change occurs until the value stays above or below the threshold for the specified interval.
This behavior helps to ensure that unwarranted notifications are avoided when values vary widely without having any definite trend. You can experiment with the thresholds and intervals until you are comfortable with the sensitivity of the notification settings.
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