Comment #2 on issue 934 by [email protected]: java.lang.OutOfMemoryError: Java heap space when creating an n-gram index
https://code.google.com/p/asterixdb/issues/detail?id=934

The int array is the pointer array storing the offset to the frame tuples which is created when the FrameMemoryBuffer is full. If the pointer is that big then the objects it pointed to could be even bigger.

The source of the problem is that the `frameLimit` parameter that sent to initialize the `ExternalSortRunGenerator` is too larger.
Can you find out how big is that `frameLimit`?
And what is the `compiler.framesize` and `compiler.sortmemory` in your settings?

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