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- W4384644303 abstract "In real-world recommender model deployments, the models are typically retrained and deployed repeatedly. It is the rule-of-thumb to periodically retrain recommender models to capture up-to-date user behavior and item trends. However, the harm caused by delayed model updates has not been investigated extensively yet. in this perspective paper, we formulate the delayed model update problem and quantitatively demonstrate the delayed model update actually harms the model performance by increasing the number of cold users and cold items increase and decreasing overall model performances. These effects vary across different domains having different characteristics. Upon these findings, we further argue that although the delayed model update has negative effects on online recommender model deployment, yet it has not gathered enough attention from research communities. We argue our verification of the relationship between the model update cycle and model performance calls for further research such as faster model training, and more efficient data pipelines to keep the model more up-to-date with the latest user behaviors and item trends." @default.
- W4384644303 created "2023-07-19" @default.
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- W4384644303 date "2023-07-18" @default.
- W4384644303 modified "2023-09-27" @default.
- W4384644303 title "How Important is Periodic Model update in Recommender System?" @default.
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- W4384644303 doi "https://doi.org/10.1145/3539618.3591934" @default.
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