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From "Jieshan Bean (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5900) HRegion#FIXED_OVERHEAD is miscalculated in 94.
Date Mon, 30 Apr 2012 06:50:50 GMT
Jieshan Bean created HBASE-5900:

             Summary: HRegion#FIXED_OVERHEAD is miscalculated in 94.
                 Key: HBASE-5900
                 URL: https://issues.apache.org/jira/browse/HBASE-5900
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.94.0
            Reporter: Jieshan Bean
            Assignee: Jieshan Bean
             Fix For: 0.94.1

After apply the patch of HBASE-5611, and tested on a 32-bit machine. This problem was triggered.
Before this patch, TestHeapSize is passed by pure coincidence in 94.
  public static final long FIXED_OVERHEAD = ClassSize.align(
      ClassSize.OBJECT +
      ClassSize.ARRAY +
      30  * ClassSize.REFERENCE + Bytes.SIZEOF_INT +
      (6 * Bytes.SIZEOF_LONG) +

Actually, there are 31 REFERENCEs and 5 LONGs in HRegion.

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