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Posted to dev@qpid.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/08/05 14:52:00 UTC
[jira] [Commented] (QPID-8557) [Broker-J] Batching mode for
CoalescingCommitter
[ https://issues.apache.org/jira/browse/QPID-8557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17394084#comment-17394084 ]
ASF GitHub Bot commented on QPID-8557:
--------------------------------------
dakirily opened a new pull request #105:
URL: https://github.com/apache/qpid-broker-j/pull/105
The purpose of this PR is addition of batching mode to the CoalescingCommitter allowing BDB log flush in configurable chunks and increasing performance (see [QPID-8557](https://issues.apache.org/jira/browse/QPID-8557)).
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> [Broker-J] Batching mode for CoalescingCommitter
> ------------------------------------------------
>
> Key: QPID-8557
> URL: https://issues.apache.org/jira/browse/QPID-8557
> Project: Qpid
> Issue Type: Improvement
> Components: Broker-J
> Affects Versions: qpid-java-broker-8.0.5
> Reporter: Daniil Kirilyuk
> Priority: Minor
>
> Although QPID-8547 introduced configurable parameters for CoalescingCommitter, BDB log is flushed to disc on every message. That is caused by calling future.get() inside of org.apache.qpid.server.txn.AsyncCommand.complete(). Such call forces broker to wait until CoalescingCommiter calls #CommitThread#processJobs() making the operation effectively sync instead of async (every message triggers processJobs() and data flush).
> To improve overall performance we suggest to add batching mode for CoalescingCommitter, which would consider BDBVirtualHost parameters and flush data in chunks of size ${qpid.broker.bdbCommiterNotifyThreshold} or every ${qpid.broker.bdbCommiterWaitTimeout} ms (whatever comes first).
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