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From "Phil Steitz (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DBCP-357) Connection validationQuery mechanism should be replaced by new method connection#isValid()
Date Sat, 30 Apr 2011 17:34:03 GMT

     [ https://issues.apache.org/jira/browse/DBCP-357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phil Steitz updated DBCP-357:
-----------------------------

    Fix Version/s: 2.0

> Connection validationQuery mechanism should be replaced by new method connection#isValid()
> ------------------------------------------------------------------------------------------
>
>                 Key: DBCP-357
>                 URL: https://issues.apache.org/jira/browse/DBCP-357
>             Project: Commons Dbcp
>          Issue Type: Improvement
>    Affects Versions: 1.4, 1.4.1
>            Reporter: Philippe Mouawad
>              Labels: PERFORMANCE
>             Fix For: 2.0
>
>
> Hello,
> Current method of connection validation relies on validationQuery.
> This method has a rather big performance impact on the DB (CPU, for example 3% with SELECT
1 FROM DUAL even with Oracle 10G FAST DUAL) and make an additional query for each borrow (when
testOnBorrow is true).
> Wouldn't it be better to use new JDBC 4 method isValid which relies on Driver check ?
(Oracle would for example use its internal method ping)
> Thank you
> Philippe
> http://www.ubik-ingenierie.com

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