zhztheplayer opened a new issue, #7750:
URL: https://github.com/apache/incubator-gluten/issues/7750
### Description
So far `ColumnarBuildSideRelation` is allocated on Spark JVM heap memory.
```
case class ColumnarBuildSideRelation(output: Seq[Attribute], batches:
Array[Array[Byte]]) {
...
}
```
It appears that we can replace `batches: Array[Array[Byte]]` with an
off-heap allocated container to move the memory usage to off-heap. This could
avoid some of the heap OOM issues.
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