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Finding a "Kneedle" in a Haystack: Detecting Knee Points in System Behavior
Abstract
Computer systems often reach a point at which the relative cost to increase some tunable parameter is no longer worth the corresponding performance benefit. These "knees'' typically represent beneficial points that system designers have long selected to best balance inherent trade-offs. While prior work largely uses ad hoc, system-specific approaches to detect knees, we present Kneedle, a general approach to on line and off line knee detection that is applicable to a wide range of systems. We define a knee formally for continuous functions using the mathematical concept of curvature and compare our definition against alternatives. We then evaluate Kneedle's accuracy against existing algorithms on both synthetic and real data sets, and evaluate its performance in two different applications.
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Metadata
- Authors
- Satopaa, V., Albrecht, J., Irwin, D., & Raghavan, B.
- Venue
- 2011 31st International Conference on Distributed Computing Systems Workshops
- Publisher
- IEEE
- Published
- 2011-06
- Pages
- 166-171
- OpenAlex
- W2097749765
- Cited by
- 1,274
- References
- 0
- FWCI
- 3.43
- Type
- conference paper
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Finding a "Kneedle" in a Haystack: Detecting Knee Points in System Behavior. https://app.cochat.ai/papers/10.1109/icdcsw.2011.20
- The paper
- Satopaa, V., Albrecht, J., Irwin, D., & Raghavan, B. (2011). Finding a "Kneedle" in a Haystack: Detecting Knee Points in System Behavior. 2011 31st International Conference on Distributed Computing Systems Workshops. https://doi.org/10.1109/icdcsw.2011.20
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
