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Posted to dev@hive.apache.org by "Hive QA (JIRA)" <ji...@apache.org> on 2014/05/02 03:42:17 UTC
[jira] [Commented] (HIVE-6430) MapJoin hash table has large memory
overhead
[ https://issues.apache.org/jira/browse/HIVE-6430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13987252#comment-13987252 ]
Hive QA commented on HIVE-6430:
-------------------------------
{color:red}Overall{color}: -1 at least one tests failed
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12642792/HIVE-6430.12.patch
{color:red}ERROR:{color} -1 due to 6 failed/errored test(s), 5433 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_groupby2_map_skew
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_stats_list_bucket
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_stats_partscan_1_23
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_root_dir_external_table
org.apache.hadoop.hive.cli.TestNegativeCliDriver.testNegativeCliDriver_dynamic_partitions_with_whitelist
org.apache.hadoop.hive.cli.TestNegativeCliDriver.testNegativeCliDriver_stats_partialscan_autogether
{noformat}
Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/98/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-Build/98/console
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 6 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12642792
> MapJoin hash table has large memory overhead
> --------------------------------------------
>
> Key: HIVE-6430
> URL: https://issues.apache.org/jira/browse/HIVE-6430
> Project: Hive
> Issue Type: Improvement
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-6430.01.patch, HIVE-6430.02.patch, HIVE-6430.03.patch, HIVE-6430.04.patch, HIVE-6430.05.patch, HIVE-6430.06.patch, HIVE-6430.07.patch, HIVE-6430.08.patch, HIVE-6430.09.patch, HIVE-6430.10.patch, HIVE-6430.11.patch, HIVE-6430.12.patch, HIVE-6430.12.patch, HIVE-6430.patch
>
>
> Right now, in some queries, I see that storing e.g. 4 ints (2 for key and 2 for row) can take several hundred bytes, which is ridiculous. I am reducing the size of MJKey and MJRowContainer in other jiras, but in general we don't need to have java hash table there. We can either use primitive-friendly hashtable like the one from HPPC (Apache-licenced), or some variation, to map primitive keys to single row storage structure without an object per row (similar to vectorization).
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