As the load on the server nears the boundary, a minor increase in the load can rapidly plunge the server into a situation resembling deadlock, where it attempts to serve more and more files at slower and slower speeds such that no files (or very few) are successfully served. The majority of today's UNIX based servers allow a large number of simultaneous connections, and are particularly susceptible to this problem. Ironically, it is the servers on Macintosh and Windows platforms, often criticized for their limited number of simultaneous connections, that are guaranteed to avoid such server deadlock.

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