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

Posted to oak-issues@jackrabbit.apache.org by "Andrei Dulvac (JIRA)" <ji...@apache.org> on 2015/04/07 14:05:12 UTC

[jira] [Commented] (OAK-2723) FileStore does not scale because of precomputed graph on TarReader

    [ https://issues.apache.org/jira/browse/OAK-2723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483073#comment-14483073 ] 

Andrei Dulvac commented on OAK-2723:
------------------------------------

If you need a memory dump, I can provide that offline, it's not possible (or desirable) to attach it in jira.

> FileStore does not scale because of precomputed graph on TarReader
> ------------------------------------------------------------------
>
>                 Key: OAK-2723
>                 URL: https://issues.apache.org/jira/browse/OAK-2723
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: oak-core
>    Affects Versions: 1.1.8
>            Reporter: Andrei Dulvac
>         Attachments: 0001-TarReader-fix-for-precomputed-graph.patch
>
>
> The {{FileStore}} keeps a reference to all {{TarReader}} object, one per each file. In my test, for an ~350 Gb repository, that was ~1100 tar files, with a {{TarReader}} for each. 
> The problem is {{TarReader}} keeps a reference to a precomputed _graph_ {{ByteBuffer}}, which is not really used that much.
> The effect is you need more that 6GB of Ram just to instantiate the {{FileStore}} object.
> The attached patch fixes this issue. 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)