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Lefty Leverenz commented on HIVE-7685: -------------------------------------- Doc note: This adds *parquet.memory.pool.ratio* to HiveConf.java. bq. This config parameter is defined in Parquet, so that it does not start with 'hive.' But should it be documented in Hive's wiki even though it's a Parquet parameter, since it's in HiveConf.java? > Parquet memory manager > ---------------------- > > Key: HIVE-7685 > URL: https://issues.apache.org/jira/browse/HIVE-7685 > Project: Hive > Issue Type: Improvement > Components: Serializers/Deserializers > Reporter: Brock Noland > Assignee: Dong Chen > Fix For: 0.15.0 > > Attachments: HIVE-7685.1.patch, HIVE-7685.1.patch.ready, > HIVE-7685.patch, HIVE-7685.patch.ready > > > Similar to HIVE-4248, Parquet tries to write large very large "row groups". > This causes Hive to run out of memory during dynamic partitions when a > reducer may have many Parquet files open at a given time. > As such, we should implement a memory manager which ensures that we don't run > out of memory due to writing too many row groups within a single JVM. -- This message was sent by Atlassian JIRA (v6.3.4#6332)