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Web Mining plays a vital role in research area in the field of data mining. Hence, in this study some algorithms are presented which can be used according to one’s requirement. Apriori and FP tree are the most popular algorithm used for the purpose of mining data. Apriori is not very effective in many cases because candidate key generation is costly. FP Tree is also used but it generates explosive quantity lacks of good candidate generation method. In this paper one way is to use Pre-fetching with web usage mining that makes the performance of proxy server improved in terms of response.