Does the jvm code cache area exist in heap or metaspace?

Question

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Does the JVM code cache area exist in heap or metaspace in jdk 8?

Answer 1

Neither in Heap nor in Metaspace. In HotSpot JVM Code Cache is a separate off-heap area. Its size is controlled by -XX:ReservedCodeCacheSize option.

On the "Memory" tab of Java Mission Control you'll find the Code Cache among other JVM memory pools:

More about JVM memory areas