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https://issues.apache.org/jira/browse/HIVE-17935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349723#comment-16349723
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Hive QA commented on HIVE-17935:
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m
0s{color} | {color:blue} Findbugs executables are not available. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 1m
31s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 5m
52s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
52s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
8s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
30s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
21s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
5s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
24s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
12s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 19m 17s{color} |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense javac javadoc findbugs checkstyle compile |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian
3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /data/hiveptest/working/yetus/dev-support/hive-personality.sh |
| git revision | master / 32b8994 |
| Default Java | 1.8.0_111 |
| modules | C: common ql itests/hive-unit U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-8980/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> Turn on hive.optimize.sort.dynamic.partition by default
> -------------------------------------------------------
>
> Key: HIVE-17935
> URL: https://issues.apache.org/jira/browse/HIVE-17935
> Project: Hive
> Issue Type: Bug
> Reporter: Andrew Sherman
> Assignee: Andrew Sherman
> Priority: Major
> Attachments: HIVE-17935.1.patch, HIVE-17935.2.patch,
> HIVE-17935.3.patch, HIVE-17935.4.patch, HIVE-17935.5.patch,
> HIVE-17935.6.patch, HIVE-17935.7.patch, HIVE-17935.8.patch
>
>
> The config option hive.optimize.sort.dynamic.partition is an optimization for
> Hive’s dynamic partitioning feature. It was originally implemented in
> [HIVE-6455|https://issues.apache.org/jira/browse/HIVE-6455]. With this
> optimization, the dynamic partition columns and bucketing columns (in case of
> bucketed tables) are sorted before being fed to the reducers. Since the
> partitioning and bucketing columns are sorted, each reducer can keep only one
> record writer open at any time thereby reducing the memory pressure on the
> reducers. There were some early problems with this optimization and it was
> disabled by default in HiveConf in
> [HIVE-8151|https://issues.apache.org/jira/browse/HIVE-8151]. Since then
> setting hive.optimize.sort.dynamic.partition=true has been used to solve
> problems where dynamic partitioning produces with (1) too many small files on
> HDFS, which is bad for the cluster and can increase overhead for future Hive
> queries over those partitions, and (2) OOM issues in the map tasks because it
> trying to simultaneously write to 100 different files.
> It now seems that the feature is probably mature enough that it can be
> enabled by default.
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