Zheng Wang created HBASE-27805:
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             Summary: 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


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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