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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARTEMIS-1318) Uses unbuffered MAPPED Journal if no data-sync is required
Date Wed, 02 Aug 2017 09:44:00 GMT

    [ https://issues.apache.org/jira/browse/ARTEMIS-1318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16110629#comment-16110629
] 

ASF GitHub Bot commented on ARTEMIS-1318:
-----------------------------------------

GitHub user franz1981 opened a pull request:

    https://github.com/apache/activemq-artemis/pull/1436

    ARTEMIS-1318 Uses unbuffered MAPPED Journal if no data-sync is required

    In order to reduce memory footprint, CPU usage and reduce latencies it avoid to use the
TimedBuffer on the MAPPED journal if no datasync is required.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/franz1981/activemq-artemis mapped_timed_buffer_fix

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/activemq-artemis/pull/1436.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1436
    
----
commit 77c2f61ffee363b437ad4e39d4b4ed74ebb3c651
Author: Francesco Nigro <nigro.fra@gmail.com>
Date:   2017-07-27T08:47:08Z

    ARTEMIS-1318 Uses unbuffered MAPPED Journal if no data-sync is required

----


> Uses unbuffered MAPPED Journal if no data-sync is required
> ----------------------------------------------------------
>
>                 Key: ARTEMIS-1318
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-1318
>             Project: ActiveMQ Artemis
>          Issue Type: Improvement
>            Reporter: Francesco Nigro
>            Assignee: Francesco Nigro
>
> Disable the TimedBuffer on MAPPED journal if no data-sync in required:
> * reduced footprint (no TimedBuffer)
> * reduced CPU usage (less buffer copy and no TimedBuffer background timer thread)
> * reduced latencies (not timeout can influence when the write will happen)



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