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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARTEMIS-822) Reduce thread synchronization on the Journal
Date Fri, 14 Apr 2017 05:28:41 GMT

    [ https://issues.apache.org/jira/browse/ARTEMIS-822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968649#comment-15968649
] 

ASF subversion and git services commented on ARTEMIS-822:
---------------------------------------------------------

Commit ec9615a01a847e7a7be95c0d0b45ae0067065504 in activemq-artemis's branch refs/heads/1.x
from Clebert Suconic
[ https://git-wip-us.apache.org/repos/asf?p=activemq-artemis.git;h=ec9615a ]

ARTEMIS-1114 Missing records after compacting

This is fixing an issue introduced on 4b47461f03a607b9ef517beb2a1666ffae43a2a7 (ARTEMIS-822)
The Transactions were being looked up without the readLock and some of the controls for Read
and Write lock
were broken after this.

(cherry picked from commit ddacda50626ef2cd5ccf74a3149eccbbda4a9d84)


> Reduce thread synchronization on the Journal
> --------------------------------------------
>
>                 Key: ARTEMIS-822
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-822
>             Project: ActiveMQ Artemis
>          Issue Type: Improvement
>    Affects Versions: 1.4.0
>            Reporter: Luis Barreiro
>            Assignee: clebert suconic
>            Priority: Blocker
>              Labels: journal
>             Fix For: 1.5.0
>
>
> Currently there is a lock in the journal so that only one thread can append at a time.
Although the operation is fast, it can become a bottleneck on environments with hundreds of
threads. There should be a way for threads not  to be blocked on append operations.



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