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TezQA commented on TEZ-3772: ---------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12874553/tez-3772.002.patch against master revision a7f93ae. {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 4 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. There were no new javadoc warning messages. {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 3.0.1) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:green}+1 core tests{color}. The patch passed unit tests in . Test results: https://builds.apache.org/job/PreCommit-TEZ-Build/2544//testReport/ Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2544//console This message is automatically generated. > Allow slowstart for small vertices to be treated differently > ------------------------------------------------------------ > > Key: TEZ-3772 > URL: https://issues.apache.org/jira/browse/TEZ-3772 > Project: Apache Tez > Issue Type: Improvement > Reporter: Muhammad Samir Khan > Assignee: Muhammad Samir Khan > Attachments: tez-3772.001.patch, tez-3772.002.patch > > > If there are a small number of reduces (configurable), then having a > different threshold can benefit. Performance of jobs with a small number of > reduce tasks can benefit significantly. Yes, the job could specify slowstart > as 0.0 instead of the default, but that requires job owners to do something. > It would be better if the defaults did something more optimal for both large > and small jobs. -- This message was sent by Atlassian JIRA (v6.4.14#64029)