Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/3064#discussion_r19716622
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala ---
@@ -79,13 +79,13 @@ private[sql] trait SQLConf {
private[spark] def dialect: String = getConf(DIALECT, "sql")
/** When true tables cached using the in-memory columnar caching will be
compressed. */
- private[spark] def useCompression: Boolean = getConf(COMPRESS_CACHED,
"false").toBoolean
+ private[spark] def useCompression: Boolean = getConf(COMPRESS_CACHED,
"true").toBoolean
/** The compression codec for writing to a Parquetfile */
- private[spark] def parquetCompressionCodec: String =
getConf(PARQUET_COMPRESSION, "snappy")
+ private[spark] def parquetCompressionCodec: String =
getConf(PARQUET_COMPRESSION, "gzip")
/** The number of rows that will be */
--- End diff --
also nit: this isn't a very useful comment
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