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Rajesh Balamohan commented on HIVE-7052: ---------------------------------------- Failures are not related to this patch. > Optimize split calculation time > ------------------------------- > > Key: HIVE-7052 > URL: https://issues.apache.org/jira/browse/HIVE-7052 > Project: Hive > Issue Type: Bug > Environment: hive + tez > Reporter: Rajesh Balamohan > Assignee: Rajesh Balamohan > Labels: performance > Attachments: HIVE-7052-profiler-1.png, HIVE-7052-profiler-2.png, > HIVE-7052-v3.patch, HIVE-7052-v7.patch, HIVE-7052.7.patch > > > When running a TPC-DS query (query_27), significant amount of time was spent > in split computation on a dataset of size 200 GB (ORC format). > Profiling revealed that, > 1. Lot of time was spent in Config's subtitutevar (regex) in > HiveInputFormat.getSplits() method. > 2. FileSystem was created repeatedly in OrcInputFormat.generateSplitsInfo(). > I will attach the profiler snapshots soon. -- This message was sent by Atlassian JIRA (v6.2#6252)