Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14762#discussion_r75811895
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnBuilder.scala
---
@@ -61,8 +63,16 @@ private[columnar] trait CompressibleColumnBuilder[T <:
AtomicType]
super.initialize(initialSize, columnName, useCompression)
}
+ /*
+ * The various compression schemes, while saving memory use, cause all
of the data within the row to become
+ * unaligned, thus causing crashes. Until a way of fixing the
compression is found to also allow aligned accesses
+ * this must be disabled for SPARC.
+ */
protected def isWorthCompressing(encoder: Encoder[T]) = {
- encoder.compressionRatio < 0.8
+ if(misalignedArch.contains(System.getProperty("os.arch")))
--- End diff --
`encoder.compressionRatio < 0.8 && !misalignedArch...` is simpler
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