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From "Darrel Schneider (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GEODE-1593) optimized offheap size too small for many customers
Date Fri, 24 Jun 2016 22:52:16 GMT
Darrel Schneider created GEODE-1593:
---------------------------------------

             Summary: optimized offheap size too small for many customers
                 Key: GEODE-1593
                 URL: https://issues.apache.org/jira/browse/GEODE-1593
             Project: Geode
          Issue Type: Bug
          Components: offheap
            Reporter: Darrel Schneider


The largest offheap memory allocation that will be optimally reused is 132k. A recent survey
of customers found that 35% of them had an average object size  greater than 132k. This can
be increased by setting the system property "gemfire.OFF_HEAP_FREE_LIST_COUNT". The default
for this property is "16384". This results in the jvm heap allocating a single array of this
size.

If this property defaulted to "65535" then we could optimally reuse allocations smaller than
528k.




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