Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/851#issuecomment-154309302
Thanks for your reply. I also found the following phrase from the link.
```
By default class metadata allocation is limited by the amount of available
native memory.
```
So, we can expect that our test can use every available native memory with
GC. If our test is failed due to lack of available memory, it means that our
test exhaust too much memory, I think.
Here is my +1. Appreciate for your work.
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