[teiid-issues] [JBoss JIRA] (TEIID-5534) Smaller initial memory buffer allocations

[Steven Hawkins (Jira)]

     [ https://issues.jboss.org/browse/TEIID-5534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5534.
-----------------------------------
    Resolution: Done


Changed the code to allocate in 1/4 increments for smaller vms - but did not yet add any logic to reclaim them if unused.

> Smaller initial memory buffer allocations
> -----------------------------------------
>
>                 Key: TEIID-5534
>                 URL: https://issues.jboss.org/browse/TEIID-5534
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 12.0, 11.2.1
>
>
> For smaller vms, under 16 GB, the default allocation scheme for on-heap fixed memory buffers is in 1 GB increments.
> This can be quite large for VMs under 8 GBs - especially if the full commit of that memory is not needed.
> The allocation scheme should introduce the buffers more incrementally and release them when compaction is run if they aren't needed.



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