You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@bookkeeper.apache.org by "Sijie Guo (JIRA)" <ji...@apache.org> on 2013/09/11 06:47:51 UTC

[jira] [Updated] (BOOKKEEPER-536) The overhead of ReadAheadCache is too large

     [ https://issues.apache.org/jira/browse/BOOKKEEPER-536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sijie Guo updated BOOKKEEPER-536:
---------------------------------

    Fix Version/s:     (was: 4.3.0)
    
> The overhead of ReadAheadCache is too large
> -------------------------------------------
>
>                 Key: BOOKKEEPER-536
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-536
>             Project: Bookkeeper
>          Issue Type: Bug
>          Components: hedwig-server
>            Reporter: Jiannan Wang
>
> Testing with 300 bytes per message, we observed that when the presentCacheSize is 128M, while the readAheadCache size is ~800M. Total ratio is 800/128 ~= 6.25 with 5.25 times overhead.
> So if user sets readAheadCache limit size to 2G, it may consumes maximum about 15G which is too large.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira