Blue Coat Systems SG Appliance Manual De Usuario
Volume 9: Managing the Blue Coat SG Appliance
24
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 user-configurable, meaning that you can
specify the threshold level that will trigger an alert.
specify the threshold level that will trigger an alert.
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.
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.
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.
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".
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:
❐
OK—The monitored system or device is behaving normally.
❐
WARNING—The monitored system or device is outside typical operating parameters
and may require attention.
and may require attention.
❐
CRITICAL—The monitored system or device is either failing, or is far outside normal
parameters, and requires immediate attention.
parameters, and requires immediate attention.
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.
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.
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.
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.
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.