Automatic determination of high significance alert thresholds for system performance metrics using an exponentially tailed model
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United States of America Patent
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May 29, 2007
Grant Date -
Jan 4, 2007
app pub date -
Jun 30, 2005
filing date -
Jun 30, 2005
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Abstract
A computer is programmed to fit exponential models to upper percentile subsets of observed measurements for performance metrics collected as attributes of a computer system. The subsets are defined from sets chosen to reduce model bias due to expected variations in system performance, e.g. those resulting from temporal usage patterns induced by end users and/or workload scheduling. Measurement levels corresponding to high cumulative probability, indicative of likely performance anomalies, are extrapolated from the fitted models generated from measurements of lower cumulative probability. These levels are used to establish and to automatically set warning and alert thresholds which signal to (human) administrators when performance anomalies are observed.
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