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Posted to oak-issues@jackrabbit.apache.org by "Thomas Mueller (JIRA)" <ji...@apache.org> on 2014/02/04 11:10:11 UTC

[jira] [Commented] (OAK-1383) Reduce memory usage of the cache

    [ https://issues.apache.org/jira/browse/OAK-1383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890531#comment-13890531 ] 

Thomas Mueller commented on OAK-1383:
-------------------------------------

Revision 1564238 (DocumentMK only so far)

> Reduce memory usage of the cache
> --------------------------------
>
>                 Key: OAK-1383
>                 URL: https://issues.apache.org/jira/browse/OAK-1383
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>             Fix For: 0.16
>
>
> The LIRS cache calculates the estimated number of cells using the cache size and the average entry size, and allocates empty arrays accordingly.
> Currently, the LIRS cache uses a default entry size of 100 bytes, which is relatively low. Because of that, even an empty cache needs quite a lot of memory.
> I found the average size of the entries is around 2000 for our unit tests. Using this average size should reduce memory usage a lot.



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