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[HIVE-10107] Union All : Vertex missing stats resulting in OOM and in-efficient plans - Hive - [issue]
...Reducer Vertices sending data to a Union all edge are missing statistics and as a result we either use very few reducers in the UNION ALL edge or decide to broadcast the results of UNION ALL...
http://issues.apache.org/jira/browse/HIVE-10107    Author: Mostafa Mokhtar, 2015-03-26, 23:26
[HIVE-10106] Regression : Dynamic partition pruning not working after HIVE-9976 - Hive - [issue]
...After HIVE-9976 got checked in dynamic partition pruning doesn't work.Partitions are pruned and later show up in splits....
http://issues.apache.org/jira/browse/HIVE-10106    Author: Mostafa Mokhtar, 2015-03-26, 22:52
Re: ORC separate project - Hive - [mail # dev]
...Hi Owen,Please add me as well.ThanksMostafaOn 3/19/15, 3:21 PM, "Xuefu Zhang"  wrote: ...
   Author: Mostafa Mokhtar, 2015-03-21, 03:01
[HIVE-7664] VectorizedBatchUtil.addRowToBatchFrom is not optimized for Vectorized execution and takes 25% CPU - Hive - [issue]
...In a Group by heavy vectorized Reducer vertex 25% of CPU is spent in VectorizedBatchUtil.addRowToBatchFrom().Looked at the code of VectorizedBatchUtil.addRowToBatchFrom and it looks like it ...
http://issues.apache.org/jira/browse/HIVE-7664    Author: Mostafa Mokhtar, 2015-03-20, 23:21
[HIVE-9368] Physical optimizer : Join order in Explain is different from join order provided by Calcite - Hive - [issue]
...Join order in explain is different from that provided by Calcite....
http://issues.apache.org/jira/browse/HIVE-9368    Author: Mostafa Mokhtar, 2015-03-16, 15:06
[HIVE-8524] When table is renamed stats are lost as changes are not propagated to metastore tables TAB_COL_STATS and PART_COL_STATS - Hive - [issue]
...When a Hive table is renamed that the name is not updated in TAB_COL_STATS and PART_COL_STATS.Repro 1) Create table 2) insert rows3) Analyze table t1 compute statistics for columns;4) set hi...
http://issues.apache.org/jira/browse/HIVE-8524    Author: Mostafa Mokhtar, 2015-03-12, 18:25
[HIVE-9714] Physical optimizer : Under estimation for left join outer condition - Hive - [issue]
...For the query below which is a subset of TPC-DS Query 80, CBO joins catalog_sales with catalog_returns first although the CE of the join is relatively high.The physical optimizer estimates f...
http://issues.apache.org/jira/browse/HIVE-9714    Author: Mostafa Mokhtar, 2015-03-12, 18:25
[HIVE-9647] Discrepancy in cardinality estimates between partitioned and un-partitioned tables - Hive - [issue]
...High-level summaryHiveRelMdSelectivity.computeInnerJoinSelectivity relies on per column number of distinct value to estimate join selectivity.The way statistics are aggregated for partitione...
http://issues.apache.org/jira/browse/HIVE-9647    Author: Mostafa Mokhtar, 2015-03-10, 05:29
[HIVE-9713] CBO : inefficient join order created for left join outer condition - Hive - [issue]
...For the query below which is a subset of TPC-DS Query 80, CBO joins catalog_sales with catalog_returns first although the CE of the join is relatively high.catalog_sales should be joined wit...
http://issues.apache.org/jira/browse/HIVE-9713    Author: Mostafa Mokhtar, 2015-03-06, 19:12
[HIVE-9624] NullPointerException in MapJoinOperator.processOp(MapJoinOperator.java:253) for TPC-DS Q75 against un-partitioned schema - Hive - [issue]
...Running TPC-DS Q75 against a non-partitioned schema fails with Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unexpected exception: null at org.apache.hadoop.hive.ql.exec.MapJo...
http://issues.apache.org/jira/browse/HIVE-9624    Author: Mostafa Mokhtar, 2015-03-03, 02:17
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB