To optimize the performance of web crawlers, various measures of page importance have been studied to select and order URLs in crawling. Most sophisticated measures (e.g. breadth-ﬁrst and PageRank) are based on link structure. In this paper, we treat the problem from another perspective and propose to directly measure page importance through mining user interest and behaviors from web browse logs. Unlike most existing approaches which work on single URL, in this paper, both the log mining and the crawl ordering are performed at the granularity of URL pattern. The proposed URL pattern-based crawl orderings are capable to properly predict the importance of newly created (unseen) URLs. Promising experimental results proved the feasibility of our approach.