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https://issues.apache.org/jira/browse/ARTEMIS-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francesco Nigro updated ARTEMIS-2849:
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Description: By default ASYNCIO, NIO and MAPPED journal while using
TimedBuffer are zeroing the ByteBuffers used to perform the write on the
journal: under load TimedBuffer can be big enough that zeroing would cost the
same as copying the actual content into it, hence saving the zeroing is quite
beneficial to save CPU time and increase IOPS. (was: By default ASYNCIO, NIO
and MAPPED journal while using TimedBuffer are zeroing the ByteBuffers used to
perform the write on a journal file: under load TimedBuffer can be big enough
that zeroing would cost the same as copying the actual content into it, hence
saving the zeroing is quite beneficial to save CPU time and increase IOPS.)
> Eliminate zeroing of buffers while writing the journal
> ------------------------------------------------------
>
> Key: ARTEMIS-2849
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2849
> Project: ActiveMQ Artemis
> Issue Type: Test
> Components: Broker
> Reporter: Francesco Nigro
> Priority: Major
>
> By default ASYNCIO, NIO and MAPPED journal while using TimedBuffer are
> zeroing the ByteBuffers used to perform the write on the journal: under load
> TimedBuffer can be big enough that zeroing would cost the same as copying the
> actual content into it, hence saving the zeroing is quite beneficial to save
> CPU time and increase IOPS.
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