You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Yu Sun (JIRA)" <ji...@apache.org> on 2016/07/28 18:52:20 UTC
[jira] [Created] (HBASE-16300) LruBlockCache.CACHE_FIXED_OVERHEAD
should calculate LruBlockCache size correctly
Yu Sun created HBASE-16300:
------------------------------
Summary: LruBlockCache.CACHE_FIXED_OVERHEAD should calculate LruBlockCache size correctly
Key: HBASE-16300
URL: https://issues.apache.org/jira/browse/HBASE-16300
Project: HBase
Issue Type: Bug
Reporter: Yu Sun
Assignee: Yu Sun
in current master {{LruBlockCache}}, CACHE_FIXED_OVERHEAD is calculated as this:
{code}
public final static long CACHE_FIXED_OVERHEAD = ClassSize.align(
(3 * Bytes.SIZEOF_LONG) + (10 * ClassSize.REFERENCE) +
(5 * Bytes.SIZEOF_FLOAT) + (2 * Bytes.SIZEOF_BOOLEAN)
+ ClassSize.OBJECT);
{code}
after some investigation. I think there are some wrong here, {{class LruBlockCache}}, except static varible(which is belongs to class), there are 4 long varibles(maxBlockSize,maxSize,blockSize and overhead), 9 reference varibles and 2 boolean varibles, so the above code will not calculate LruBlockCache instance size correctly.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)