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https://issues.apache.org/jira/browse/DRILL-4286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266663#comment-16266663
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ASF GitHub Bot commented on DRILL-4286:
---------------------------------------
Github user arina-ielchiieva commented on the issue:
https://github.com/apache/drill/pull/921
@dvjyothsna all tests has passed. Though there is significant performance
degradation.
Before your changes unit test run takes ~ 33 minutes, after ~ 1 hour 18
minutes.
For example, exec package:
before `[INFO] exec/Java Execution Engine ......................... SUCCESS
[17:14 min]`,
after `[INFO] exec/Java Execution Engine ......................... SUCCESS
[56:45 min]`.
Since you did not add that many unit tests, could you please explain the
reason of such performance degradation and ideally fix it.
Attached two unit tests outputs in Jira.
> Have an ability to put server in quiescent mode of operation
> ------------------------------------------------------------
>
> Key: DRILL-4286
> URL: https://issues.apache.org/jira/browse/DRILL-4286
> Project: Apache Drill
> Issue Type: New Feature
> Components: Execution - Flow
> Affects Versions: 1.11.0
> Reporter: Victoria Markman
> Assignee: Venkata Jyothsna Donapati
> Labels: doc-impacting, ready-to-commit
> Fix For: 1.12.0
>
> Attachments: consoleText.txt
>
>
> I think drill will benefit from mode of operation that is called "quiescent"
> in some databases.
> From IBM Informix server documentation:
> {code}
> Change gracefully from online to quiescent mode
> Take the database server gracefully from online mode to quiescent mode to
> restrict access to the database server without interrupting current
> processing. After you perform this task, the database server sets a flag that
> prevents new sessions from gaining access to the database server. The current
> sessions are allowed to finish processing. After you initiate the mode
> change, it cannot be canceled. During the mode change from online to
> quiescent, the database server is considered to be in Shutdown mode.
> {code}
> This is different from shutdown, when processes are terminated.
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