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https://issues.apache.org/jira/browse/HBASE-27805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Wang updated HBASE-27805:
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Attachment: chunksize-2048k-fullgc.png
> The chunk created by mslab may cause memory fragement and leading to fullgc
> ---------------------------------------------------------------------------
>
> Key: HBASE-27805
> URL: https://issues.apache.org/jira/browse/HBASE-27805
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Zheng Wang
> Assignee: Zheng Wang
> Priority: Major
> Attachments: chunksize-2048k-fullgc.png
>
>
> The default size of chunk is 2MB, when we use G1, if heapRegionSize equals
> 4MB, these chunks are allocated as humongous objects, exclusively allocating
> one region, then the remaining 2MB become memory fragement.
> Lots of memory fragement may leading to fullgc even if the percent of used
> heap not high enough.
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