程序出现内存溢出问题，在同事机子上程序运行正常，在我机子上老是报内存溢出的错误，而且单起tomcat会好一些，用Myeclipse启动tomcat频繁报错,报错信息如下：
报错信息
2012-08-27 15:55:56 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet default threw exception
java.lang.OutOfMemoryError: PermGen space
at sun.misc.Unsafe.defineClass(Native Method)
at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:45)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
at sun.reflect.MethodAccessorGenerator.generateMethod(MethodAccessorGenerator.java:59)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:28)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)