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0d0444587373bdecce45bb80de6c826eee238197mark xmlns='http://docbook.org/ns/docbook' version='5.0' xml:lang='en'
0d0444587373bdecce45bb80de6c826eee238197mark <indexterm>
0d0444587373bdecce45bb80de6c826eee238197mark </indexterm>
0d0444587373bdecce45bb80de6c826eee238197mark OpenDJ needs to be able to open many file descriptors,
0d0444587373bdecce45bb80de6c826eee238197mark especially when handling thousands of client connections.
0d0444587373bdecce45bb80de6c826eee238197mark Linux systems in particular often set a limit of 1024 per user,
0d0444587373bdecce45bb80de6c826eee238197mark which is too low to handle many client connections to OpenDJ.
0d0444587373bdecce45bb80de6c826eee238197mark When setting up OpenDJ for production use,
0d0444587373bdecce45bb80de6c826eee238197mark make sure OpenDJ can use at least 64K (65536) file descriptors.
0d0444587373bdecce45bb80de6c826eee238197mark For example when running OpenDJ as user <literal>opendj</literal>
0d0444587373bdecce45bb80de6c826eee238197mark on a Linux system that uses
0d0444587373bdecce45bb80de6c826eee238197mark <filename>/etc/security/limits.conf</filename> to set user level limits,
0d0444587373bdecce45bb80de6c826eee238197mark you can set soft and hard limits by adding these lines to the file:
0d0444587373bdecce45bb80de6c826eee238197mark <programlisting language="none">opendj soft nofile 65536
0d0444587373bdecce45bb80de6c826eee238197markopendj hard nofile 131072</programlisting>
0d0444587373bdecce45bb80de6c826eee238197mark The example above assumes the system has
0d0444587373bdecce45bb80de6c826eee238197mark enough file descriptors available overall.
0d0444587373bdecce45bb80de6c826eee238197mark You can check the Linux system overall maximum as follows.
0d0444587373bdecce45bb80de6c826eee238197mark204252</screen>