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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3353) Derby should use Dynamic Data format to flow small lobs by value instead of locator
Date Tue, 25 May 2010 08:07:25 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-3353:
-----------------------------------

    Bug behavior facts: [Performance]

> Derby should use Dynamic Data format to flow small lobs by value instead of locator
> -----------------------------------------------------------------------------------
>
>                 Key: DERBY-3353
>                 URL: https://issues.apache.org/jira/browse/DERBY-3353
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Client, Network Server
>    Affects Versions: 10.3.1.4, 10.4.1.3
>         Environment: DRDA allows for "Dynamic Data Format" to allow lob data to be transferred
in one of three formats according to size.
> X'01' Data in QRYDTA.
> X'02' Data in EXTDTA.
> X'03' Data as a progressive reference.
> Currently we send all lob data by locator, meaning we make at least two stored procedure
calls per locator, one to retrieve the length and one to retrieve the substring. This can
lead to  excessive overhead for small lobs.
>            Reporter: Kathey Marsden
>


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