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] [Updated] (HBASE-16300) LruBlockCache.CACHE_FIXED_OVERHEAD
should calculate LruBlockCache size correctly
[ https://issues.apache.org/jira/browse/HBASE-16300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yu Sun updated HBASE-16300:
---------------------------
Status: Patch Available (was: Open)
> 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)