[jira] [Closed] (ARTEMIS-1151) Adapting TimedBuffer and NIO Buffer Pooling

["clebert suconic (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARTEMIS-1151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

clebert suconic closed ARTEMIS-1151.
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> 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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