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https://issues.apache.org/jira/browse/TAJO-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14389965#comment-14389965
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ASF GitHub Bot commented on TAJO-1130:
--------------------------------------
Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/423#issuecomment-88344313
As @jinossy said, it would be better if this feature is enabled only in
unit tests by default. ```TajoTestingCluster::initPropertiesAndConfigs()```
looks good to enable it for unit tests. Additionally, you also should increase
```WORKER_RESOURCE_AVAILABLE_MEMORY_MB``` because only a single task can be
executed with a query master due to the small size of the default available
memory (1024 MB). Please note that a query master and a task use 512 MB by
default, respectively.
> Concurrent execution of independent execution blocks
> -----------------------------------------------------
>
> Key: TAJO-1130
> URL: https://issues.apache.org/jira/browse/TAJO-1130
> Project: Tajo
> Issue Type: Improvement
> Components: query master
> Reporter: Jihoon Son
> Assignee: Navis
>
> Currently, Tajo can execute ExecutionBlocks one by one even though there
> remain enough resources to execute two or more ExecutionBlocks.
> We can improve the query processing performance by executing two or more
> independent ExecutionBlocks if possible.
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