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Kevin English commented on SPARK-20074: --------------------------------------- I found this issue from external content that indicated that this limits IO write block sizes, for instance for parquet files following a N:1 re-partitioning. Can someone confirm that being able to radically increase this value would reduce spilling when aggregating a large number of small files? > Make buffer size in unsafe external sorter configurable > ------------------------------------------------------- > > Key: SPARK-20074 > URL: https://issues.apache.org/jira/browse/SPARK-20074 > Project: Spark > Issue Type: Improvement > Components: Spark Core > Affects Versions: 2.0.1 > Reporter: Sital Kedia > Priority: Major > > Currently, it is hardcoded to 32kb, see - > https://github.com/sitalkedia/spark/blob/master/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java#L123 -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org