本文解释了为何在重部署Web应用时会出现内存使用率上升的现象。主要是因为类加载器及其加载的Class对象无法被回收，它们会被JVM储存在永久代堆中。每次重部署都会创建新的类加载器并加载类的副本，最终可能导致OutOfMemoryError。
Why does the memory usage increase when I redeploy a web application?
Because the Classloader (and the Class objects it loaded) cannot be recycled. They are stored in the permanent heap generation by the JVM, and when you redepoy a new class loader is created, which loads another copy of all these classes. This can cause OufOfMemoryErrors eventually.
Because the Classloader (and the Class objects it loaded) cannot be recycled. They are stored in the permanent heap generation by the JVM, and when you redepoy a new class loader is created, which loads another copy of all these classes. This can cause OufOfMemoryErrors eventually.
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