Android Studio错误：无法启动守护程序进程

Android 开发过程中，大家可能经常遇到这样的问题：

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Error:Unable to start the daemon process.
This problem might be caused by incorrect configuration of the daemon.
For example, an unrecognized jvm option is used.
Please refer to the user guide chapter on the daemon at https://docs.gradle.org/2.14.1/userguide/gradle_daemon.html
Please read the following process output to find out more:

Error occurred during initialization of VM
Could not reserve enough space for 2097152KB object heap
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0

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把org.gradle.jvmargs=-Xmx1536m的1536 改为512

org.gradle.jvmargs=-Xmx512m

rebuild一下就好了,什么原理呢？也就是JVM内存占用的太大了。