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https://issues.apache.org/jira/browse/ARTEMIS-1151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francesco Nigro resolved ARTEMIS-1151.
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Resolution: Fixed
> Adapting TimedBuffer and NIO Buffer Pooling
> -------------------------------------------
>
> Key: ARTEMIS-1151
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1151
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Reporter: Francesco Nigro
> Assignee: Francesco Nigro
> Priority: Minor
>
> This is the list of improvements:
> - NIO/ASYNCIO new TimedBuffer with adapting batch window heuristic
> - NIO/ASYNCIO improved TimedBuffer write monitoring with lightweight
> concurrent performance counters
> - NIO/ASYNCIO journal/paging operations benefit from less buffer copy
> - NIO/ASYNCIO any buffer copy is always performed with raw batch copy using
> SIMD instrinsics (System::arrayCopy) or memcpy under the hood
> - NIO improved clear buffers using SIMD instrinsics (Arrays::fill) and/or
> memset
> - NIO journal operation perform by default TLABs allocation pooling (off
> heap) retaining only the last max sized buffer
> - NIO improved file copy operations using zero-copy FileChannel::transfertTo
> - NIO improved zeroing using pooled single OS page buffer to clean the file +
> pwrite (on Linux)
> - NIO deterministic release of unpooled direct buffers to avoid OOM errors
> due to slow GC
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