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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-1112) CacheManager interval between recalculation of cache sizes should be configurable
Date Fri, 29 Feb 2008 14:18:51 GMT

     [ https://issues.apache.org/jira/browse/JCR-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting updated JCR-1112:
-------------------------------

    Fix Version/s: 1.3.4

Merged to the 1.3 branch in revision 631606.

> CacheManager interval between recalculation of cache sizes should be configurable
> ---------------------------------------------------------------------------------
>
>                 Key: JCR-1112
>                 URL: https://issues.apache.org/jira/browse/JCR-1112
>             Project: Jackrabbit
>          Issue Type: New Feature
>          Components: jackrabbit-core
>            Reporter: Przemo Pakulski
>            Assignee: Thomas Mueller
>            Priority: Minor
>             Fix For: 1.3.4, 1.4
>
>         Attachments: JCR-1112.txt
>
>
> Currently interval between recaluclation of cahce size is hard coded to 1000 ms. Resizing/recalculation
of cache size is quite expensive method (especially getMemoryUsed on MLRUItemStateCache is
time consuming)
> Depending on the configuration, we realized that under some load up to 10-15% percent
of CPU time (profiler metrics) could be spend doing such recalculations. It does not seem
to be needed to resize cache every second. Best this interval should be configurable in external
config. file with other cache settings (like memory sizes).

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