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一起来Google Plus吧
http://www.renren.it/a/ITxinwen/google/2011/0810/84522.html

Java内存溢出之PermGen OOM深入分析
http://www.cnblogs.com/zhuxing/articles/1247621.html

Java:内存溢出种类
http://www.xue5.com/itedu/200707/129623.html

内存溢出问题的解决
http://apps.hi.baidu.com/share/detail/2512527

log4j.properties配置详解
http://www.cnblogs.com/ITEagle/archive/2010/04/23/1718365.html

关于log4j重复输出的问题
http://www.blogjava.net/Jhonney/archive/2007/03/23/105947.html
http://chxkyy.iteye.com/blog/120640