[ 
https://issues.apache.org/jira/browse/HIVE-19824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506752#comment-16506752
 ] 

Hive QA commented on HIVE-19824:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12926898/HIVE-19824.01wip01.patch

{color:red}ERROR:{color} -1 due to no test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 18 failed/errored test(s), 14512 tests 
executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[explainuser_2] 
(batchId=152)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[llap_nullscan] 
(batchId=149)
org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[unionDistinct_1] 
(batchId=151)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[bucket_map_join_tez2]
 (batchId=156)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[join_max_hashtable]
 (batchId=155)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[mapjoin_mapjoin]
 (batchId=167)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[tez_smb_main]
 (batchId=160)
org.apache.hadoop.hive.cli.TestMiniSparkOnYarnCliDriver.testCliDriver[infer_bucket_sort_reducers_power_two]
 (batchId=183)
org.apache.hadoop.hive.cli.TestTezPerfCliDriver.testCliDriver[query64] 
(batchId=255)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testMultipleTriggers2 
(batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerCustomCreatedDynamicPartitions
 (batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerCustomCreatedDynamicPartitionsMultiInsert
 (batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerCustomCreatedDynamicPartitionsUnionAll
 (batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerCustomCreatedFiles 
(batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerCustomNonExistent 
(batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerHighBytesRead 
(batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerHighShuffleBytes 
(batchId=242)
org.apache.hive.jdbc.TestTriggersWorkloadManager.testTriggerVertexRawInputSplitsNoKill
 (batchId=242)
{noformat}

Test results: 
https://builds.apache.org/job/PreCommit-HIVE-Build/11638/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/11638/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-11638/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 18 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12926898 - PreCommit-HIVE-Build

> Improve online datasize estimations for MapJoins
> ------------------------------------------------
>
>                 Key: HIVE-19824
>                 URL: https://issues.apache.org/jira/browse/HIVE-19824
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-19824.01wip01.patch, HIVE-19824.01wip01.patch
>
>
> Statistics.datasize() only accounts for "real" data size; but for example 
> handling 1M rows might introduce some datastructure overhead...if the "real" 
> data is small - even this overhead might become the real memory usage
> for 6.5M rows of (int,int) the estimation is 52MB
> in reality this eats up ~260MB from which 210MB is used to service the 
> hashmap functionality to that many rows.



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