[jira] [Commented] (DERBY-5772) Give users a way to monitor more Derby internals.

["Dag H. Wanvik (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-5772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14125533#comment-14125533 ] 

Dag H. Wanvik commented on DERBY-5772:
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Thanks, Knut. I think the additions look good. One thing, it seems you have enabled the permissions checking now, requiring SystemPermission("engine, "monitor"). Do we want to update our default server policy and policy template (and its doc incarnation) to account for this?

> Give  users a way to monitor more Derby internals.
> --------------------------------------------------
>
>                 Key: DERBY-5772
>                 URL: https://issues.apache.org/jira/browse/DERBY-5772
>             Project: Derby
>          Issue Type: Improvement
>          Components: JMX, Tools
>    Affects Versions: 10.9.1.0
>            Reporter: Rick Hillegas
>         Attachments: pagecache-counters.diff, pagecache-counters.diff, pagecache-counters.png
>
>
> We should give users a way to track hits/misses in the page cache. This will help users tune the size of the page cache. JMX-visible monitors might be a useful solution here. See the following email thread: http://old.nabble.com/Cache-Hit-Miss-rates-for-Derby-pageCache-to33865646.html#a33865646



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