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512f41403c
git-svn-id: https://svn.php.net/repository/phpdoc/fr/trunk@333490 c90b9560-bf6c-de11-be94-00142212c4b1
75 lines
2.4 KiB
XML
75 lines
2.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: d617b26e4b9db6f2a4a39e5bd45bb09e2dc91100 Maintainer: gui Status: ready -->
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<!-- Reviewed: no -->
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<chapter xml:id="mysqlnd.persist" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<title>Les connexions persistantes</title>
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<para>
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<emphasis role="bold">Utilisation des connexions persistantes</emphasis>
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</para>
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<para>
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Si <literal>mysqli</literal> est utilisé avec <literal>mysqlnd</literal>,
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lorsqu'une connexion persistante est créee, il génère un appel
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<literal>COM_CHANGE_USER</literal>
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(<literal>mysql_change_user()</literal>) sur le serveur. Ceci permet la
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re-authentification de la connexion.
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</para>
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<para>
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Comme l'appel <literal>COM_CHANGE_USER</literal> est assez lourd, il est
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possible de le désactiver à la compilation. Réutiliser une connexion
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persistante génèrera alors un appel <literal>COM_PING</literal>
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(<literal>mysql_ping</literal>) pour tester simplement si la connexion est
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réutilisable.
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</para>
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<para>
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L'utilisation de <literal>COM_CHANGE_USER</literal> peut être désactivée
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avec le drapeau de compilation
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<literal>MYSQLI_NO_CHANGE_USER_ON_PCONNECT</literal>. Par exemple:
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</para>
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<programlisting>
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<![CDATA[
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shell# CFLAGS="-DMYSQLI_NO_CHANGE_USER_ON_PCONNECT" ./configure --with-mysql=/usr/local/mysql/ --with-mysqli=/usr/local/mysql/bin/mysql_config --with-pdo-mysql=/usr/local/mysql/bin/mysql_config --enable-debug && make clean && make -j6
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]]>
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</programlisting>
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<para>
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Ou encore:
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</para>
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<programlisting>
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<![CDATA[
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shell# export CFLAGS="-DMYSQLI_NO_CHANGE_USER_ON_PCONNECT"
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shell# configure --whatever-option
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shell# make clean
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shell# make
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]]>
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</programlisting>
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<para>
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Notez que seul <literal>mysqli</literal> avec <literal>mysqlnd</literal>
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utilise <literal>COM_CHANGE_USER</literal>. Les autres extensions/pilotes
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utilisent <literal>COM_PING</literal> lors de l'utilisation de la connexion
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persistente.
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</para>
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</chapter>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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