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- キャッシュシステムの Thundering Herd 問題Add Star
--  http://labs.cybozu.co.jp/blog/kazuho/archives/2007/09/cache_and_thundering_herd.php

- prefork サーバーと thundering herd 問題
--  http://d.hatena.ne.jp/naoya/20070311/1173629378