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<!-- Module User's Guide -->

<chapter>

	<title>&adminguide;</title>

	<section>
	<title>Overview</title>
	<para>
		This module provides a statistics collector engine. It can
		track the values of various internal &kamailio; statistics
		for a specific period of time, allowing to retrieve them
		or a report over them via RPC commands.
	</para>
	</section>

	<section>
	<title>Dependencies</title>
	<section>
		<title>&kamailio; Modules</title>
		<para>
		The following modules must be loaded along this module:
		<itemizedlist>
		<listitem>
		<para>
			<emphasis>various</emphasis> - (optional, e.g., sl, tm, usrloc)
			for getting access to the statistics exported by these modules.
		</para>
		</listitem>
		</itemizedlist>
		</para>
	</section>
	<section>
		<title>External Libraries or Applications</title>
		<para>
		The following libraries or applications must be installed before running
		&kamailio; with this module loaded:
			<itemizedlist>
			<listitem>
			<para>
				<emphasis>none</emphasis>
			</para>
			</listitem>
			</itemizedlist>
		</para>
	</section>
	</section>

	<section>
	<title>Parameters</title>
	<section id="statsc.p.interval">
		<title><varname>interval</varname> (int)</title>
		<para>
			Timer interval when to record the value for statistics.
		</para>
		<para>
		<emphasis>
			Default value is 900 (15min).
		</emphasis>
		</para>
		<example>
		<title>Set <varname>interval</varname> parameter</title>
		<programlisting format="linespecific">
...
modparam("statsc", "interval", 300)
...
</programlisting>
		</example>
	</section>
	<section id="statsc.p.items">
		<title><varname>items</varname> (int)</title>
		<para>
			How many items to store for each statistic.
		</para>
		<para>
			Note: it must be set before any 'track' parameter.
		</para>
		<para>
		<emphasis>
			Default value is 100.
		</emphasis>
		</para>
		<example>
		<title>Set <varname>items</varname> parameter</title>
		<programlisting format="linespecific">
...
modparam("statsc", "items", 200)
...
</programlisting>
		</example>
	</section>
	<section id="statsc.p.track">
		<title><varname>track</varname> (str)</title>
		<para>
			Specify the statistics to track. The parameter can
			be set many times and one value can specify many
			statistics.
		</para>
		<para>
			The format is "rname=sname", where the rname is the
			name for report and sname is internal &kamailio; statistic
			name.
		</para>
		<para>
			Next statistics are tracked by default:
			<itemizedlist>
			<listitem>
			<para>
				<emphasis>shm.free</emphasis> - the internal statistic 'free_size'
				(from group 'shmem').
			</para>
			</listitem>
			<listitem>
			<para>
				<emphasis>shm.used</emphasis> - the internal statistic 'used_size'
				(from group 'shmem').
			</para>
			</listitem>
			<listitem>
			<para>
				<emphasis>shm.real_used</emphasis> - the internal statistic 'real_used_size'
				(from group 'shmem').
			</para>
			</listitem>
			</itemizedlist>
		</para>
		<para>
		<emphasis>
			Default value is "".
		</emphasis>
		</para>
		<example>
		<title>Set <varname>track</varname> parameter</title>
		<programlisting format="linespecific">
...
modparam("statsc", "track", "req.received=rcv_requests")
modparam("statsc", "track", "req.received=rcv_requests;rpl.received=rcv_replies")
...
</programlisting>
		</example>
	</section>
	</section>

	<section>
	<title>RPC Commands</title>
	<section id="statsc.rpc.report">
		<title>
		<function moreinfo="none">statsc.report</function>
		</title>
		<para>
		Get the report of recorded statistics.
		</para>
		<para>
		Name: <emphasis>statsc.report</emphasis>
		</para>
		<para>Parameters:</para>
		<itemizedlist>
			<listitem><para>_type_ : </para>
			      <itemizedlist>
	                 <listitem><para> <quote>list</quote>: list recorded values</para></listitem>
			         <listitem><para> <quote>diff</quote>: show diff between recorded values</para></listitem>
				  </itemizedlist>
			</listitem>

			<listitem><para>_name_: (optional) name of the statistic to show the report for.
			If missing or set to 'all', then the reports for all recorded statistics are done.</para></listitem>

			<listitem><para>_limit_: (optional) how many items to be included in the report</para></listitem>
		</itemizedlist>
		<para>
		Example:
		</para>
<programlisting  format="linespecific">
...
# prototype: &kamcmd; statsc.report _type_ _name_ _limit_
&kamcmd; statsc.report list
&kamcmd; statsc.report list all 10
&kamcmd; statsc.report diff
...
</programlisting>
    </section>
    </section>
</chapter>
