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Chapter 1 Overview of Performance Monitoring Function
value of
入出力回数
monitored
item
(3) Resetting threshold excess state
Once a threshold value is exceeded, the value is excluded from threshold monitoring target until the threshold excess
occurrence state is reset. This feature prevents repeated reporting of the same event of threshold excess state, under
largely fluctuating loads.
The threshold excess state is cancelled by operations on the Performance monitoring screen. Specifying the
conditions for resetting threshold excess state allows reset of threshold excess state when the conditions are satisfied.
The following conditions are specifiable for resetting the threshold excess state:
1. Time of continued values under threshold
Specify the number of threshold monitoring intervals during which a value is kept under threshold. For each
monitoring item satisfying the conditions, threshold excess state is reset. If the number of I/Os does not reach a
minimum number of I/Os specified by threshold monitoring conditions, the load of applicable interval is
recognized as under threshold.
2. Time of day
At a specified time of each day, the threshold excess state is reset for all monitoring items.
Figure 1-7 shows an example of resetting threshold excess state when "3" is specified as the number of threshold
monitoring intervals for a period of continuous values under threshold.
しきい値監視インターバルが短いため、 一時的な
Because of short threshold monitoring interval, exceeded
過負荷でしきい値超えが通知される
threshold is notified upon a temporary overload.
Threshold monitoring interval (scale: 1 minute)
しきい値監視インターバル（目盛りの単位：1 分）
Figure 1-6 Threshold Monitoring Interval
I-12
Threshold value
しきい値
Specifying "1 minute" for a
しきい値監視インターバルを
threshold monitoring interval
1 分と設定した場合
Specifying "5 minutes" for a
しきい値監視インターバルを
threshold monitoring interval
5 分と設定した場合
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