[
https://issues.apache.org/jira/browse/HIVE-20177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16546038#comment-16546038
]
Hive QA commented on HIVE-20177:
--------------------------------
| (/) *{color:green}+1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
28s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
10s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
41s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 4m
17s{color} | {color:blue} ql in master has 2273 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
6s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
32s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m
12s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m
12s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
42s{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} findbugs {color} | {color:green} 4m
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m
2s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
14s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 25m 29s{color} |
{color:black} {color} |
\\
\\
|| 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_PreCommit-HIVE-Build-12649/dev-support/hive-personality.sh
|
| git revision | master / 85a3dd7 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| modules | C: ql U: ql |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-12649/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> Vectorization: Reduce KeyWrapper allocation in GroupBy Streaming mode
> ---------------------------------------------------------------------
>
> Key: HIVE-20177
> URL: https://issues.apache.org/jira/browse/HIVE-20177
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Major
> Attachments: HIVE-20177.01.patch, HIVE-20177.WIP.patch
>
>
> The streaming mode for VectorGroupBy allocates a large number of arrays due
> to VectorKeyHashWrapper::duplicateTo()
> Since the vectors can't be mutated in-place while a single batch is being
> processed, this operation can be cut by 1000x by allocating a streaming key
> at the end of the loop, instead of reallocating within the loop.
> {code}
> for(int i = 0; i < batch.size; ++i) {
> if (!batchKeys[i].equals(streamingKey)) {
> // We've encountered a new key, must save current one
> // We can't forward yet, the aggregators have not been evaluated
> rowsToFlush[flushMark] = currentStreamingAggregators;
> if (keysToFlush[flushMark] == null) {
> keysToFlush[flushMark] = (VectorHashKeyWrapper)
> streamingKey.copyKey();
> } else {
> streamingKey.duplicateTo(keysToFlush[flushMark]);
> }
> currentStreamingAggregators =
> streamAggregationBufferRowPool.getFromPool();
> batchKeys[i].duplicateTo(streamingKey);
> ++flushMark;
> }
> {code}
> The duplicateTo can be pushed out of the loop since there only one to truly
> keep a copy of is the last unique key in the VRB.
> The actual byte[] values within the keys are safely copied out by -
> VectorHashKeyWrapperBatch.assignRowColumn() which calls setVal() and not
> setRef().
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
