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From "Randy Watler (JIRA)" <jetspeed-...@portals.apache.org>
Subject [jira] Assigned: (JS2-500) DB Page Manager should optionally cache negative hits to limit DB lookups.
Date Fri, 25 Sep 2009 18:51:16 GMT

     [ https://issues.apache.org/jira/browse/JS2-500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Randy Watler reassigned JS2-500:
--------------------------------

    Assignee: Randy Watler

> DB Page Manager should optionally cache negative hits to limit DB lookups.
> --------------------------------------------------------------------------
>
>                 Key: JS2-500
>                 URL: https://issues.apache.org/jira/browse/JS2-500
>             Project: Jetspeed 2
>          Issue Type: Improvement
>          Components: PSML
>    Affects Versions: 2.1-dev, 2.1
>            Reporter: Randy Watler
>            Assignee: Randy Watler
>            Priority: Minor
>             Fix For: 2.2.1
>
>
> Depending on profiling rules, the Page Manager may be asked repeatedly to lookup folders
that do not exist. Since these negative hits are not cached, a query to the DB will be used
to verify the fact that the folder does not exist each time. This could impact J2 performance
for large numbers of concurrent users.

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