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51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark ! Copyright 2011 ForgeRock AS
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark xsi:schemaLocation='http://docbook.org/ns/docbook http://docbook.org/xml/5.0/xsd/docbook.xsd'
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>By default, OpenDJ installs with options appropriate for evaluation, not
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark for production.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <indexterm><primary>Java</primary><secondary>Settings</secondary></indexterm>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <variablelist>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>You can change JVM options for the server in the QuickStart installer,
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark and alternatively using the Control Panel (Runtime Options > Java Settings),
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark or with the <command>dsjavaproperties</command> command after editing the
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <filename>config/java.properties</filename> file.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>The JVM heap size by default is either 256 MB or 1 GB.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>In production, use at least a 2 GB heap (-Xms2G -Xmx2G).</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>Use -server to select the HotSpot Server VM.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>For heap sizes over 4 GB on 64-bit systems use -d64.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>Use -XX:+UseConcMarkSweepGC to select the CMS garbage collector
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark for low GC pause times.</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark <para>If your directory handles high throughput, set the new generation
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark size large enough for the JVM to avoid promoting short-lived objects
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark into the old gen space (-XX:NewSize=512M).</para>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </listitem>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </varlistentry>
51607ea01068c9047391e4c8b46bc9dbd0edb7fdmark </variablelist>