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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13989) Threshold for combined MemStore and BlockCache percentages is not checked
Date Mon, 29 Jun 2015 16:57:04 GMT
Ted Yu created HBASE-13989:
------------------------------

             Summary: Threshold for combined MemStore and BlockCache percentages is not checked
                 Key: HBASE-13989
                 URL: https://issues.apache.org/jira/browse/HBASE-13989
             Project: HBase
          Issue Type: Bug
            Reporter: Ted Yu
            Assignee: Ted Yu


In HeapMemoryManager#doInit():
{code}
    blockCachePercentMinRange = conf.getFloat(BLOCK_CACHE_SIZE_MIN_RANGE_KEY, blockCachePercent);
    blockCachePercentMaxRange = conf.getFloat(BLOCK_CACHE_SIZE_MAX_RANGE_KEY, blockCachePercent);
...
    if (blockCachePercent == blockCachePercentMinRange
        && blockCachePercent == blockCachePercentMaxRange) {
      return false;
    }
{code}
If memory tuning is not specified, blockCachePercentMinRange and blockCachePercentMaxRange
would carry the value of blockCachePercent.
This would make doInit() exit before checking the threshold for combined MemStore and BlockCache
percentages.



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