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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-1372) Handle data overrun of DDMWriter buffer more efficiently
Date Mon, 29 Jun 2009 14:33:47 GMT

     [ https://issues.apache.org/jira/browse/DERBY-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Dag H. Wanvik updated DERBY-1372:

    Derby Categories: [Performance]

> Handle data overrun of DDMWriter buffer more efficiently
> --------------------------------------------------------
>                 Key: DERBY-1372
>                 URL: https://issues.apache.org/jira/browse/DERBY-1372
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Server
>    Affects Versions:
>            Reporter: Kathey Marsden
>            Priority: Minor
> Currently if data writing overruns DDMWriter's 32K buffer, 
> Network server will allocate a twice as big buffer and copy the 
> data.    This could be made more efficient.
> One possibility is to keep a shared pool of buffers and chain them. This might also help
with general scalability of network server.
> When this is fixed, the code in writeQRYDTA to guestimate if we 
> have enough remaining room in the block can be removed.

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