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Date: Mon, 25 Aug 2008 10:43:44 -0700 (PDT)
From: "Kim Haase (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Updated: (DERBY-3847) Tuning Guide lacks information on
 turning off Derby property settings
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     [ https://issues.apache.org/jira/browse/DERBY-3847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kim Haase updated DERBY-3847:
-----------------------------

    Attachment: ctunproper22250.html
                DERBY-3847-2.diff

That's a good suggestion, Dag. I've added that information to the topic in DERBY-3847-2.diff and an updated version of ctunproper22250.html. Please let me know how this looks. 

Thanks very much!

> Tuning Guide lacks information on turning off Derby property settings
> ---------------------------------------------------------------------
>
>                 Key: DERBY-3847
>                 URL: https://issues.apache.org/jira/browse/DERBY-3847
>             Project: Derby
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions: 10.4.1.3
>            Reporter: Kim Haase
>            Assignee: Kim Haase
>            Priority: Minor
>         Attachments: ctunproper22250.html, ctunproper22250.html, DERBY-3847-2.diff, DERBY-3847.diff
>
>
> The documentation of how to turn off Derby properties is spotty. Dag Wanvik reports that "I checked the code, and when you set a database property to a null value, that property is removed from the list of database properties; i.e. the situation is back to where you were before it was first set, so the built-in defaults apply again (or system properties if there are any)."
> The behavior for turning off user settings is slightly different and is documented in several places; it's the general case that seems to be missing. This information needs to be added to the description of Derby properties in the Tuning Guide, probably in the general topic "Derby properties" (http://db.apache.org/derby/docs/dev/tuning/ctunproper22250.html).

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