source: general/sysutils/sysstat.xml@ eb2cf83a

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
   "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY sysstat-download-http "http://perso.wanadoo.fr/sebastien.godard/sysstat-&sysstat-version;.tar.bz2">
  <!ENTITY sysstat-download-ftp  "ftp://ibiblio.org/pub/linux/system/status/sysstat-&sysstat-version;.tar.bz2">
  <!ENTITY sysstat-md5sum        "075488cbb5979deec0ab05f3ca0c8d12">
  <!ENTITY sysstat-size          "118 KB">
  <!ENTITY sysstat-buildsize     "1.88 MB">
  <!ENTITY sysstat-time          "0.04 SBU">
]>

<sect1 id="sysstat" xreflabel="Sysstat-&sysstat-version;">
  <?dbhtml filename="sysstat.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>Sysstat-&sysstat-version;</title>

  <indexterm zone="sysstat">
    <primary sortas="a-Sysstat">Sysstat</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Sysstat</title>

    <para>The <application>Sysstat</application> package contains utilities 
    to monitor system performance and usage activity. 
    <application>Sysstat</application> contains the <command>sar</command> 
    utility, common to many commercial Unixes, and tools you can schedule via 
    cron to collect and historize performance and activity data.</para>

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&sysstat-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&sysstat-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &sysstat-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &sysstat-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &sysstat-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &sysstat-time;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Sysstat Dependencies</bridgehead>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para><xref linkend="fcron"/></para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Sysstat</title>

    <para>Install <application>Sysstat</application> by running the 
    following commands:</para>

<screen><userinput>make config &amp;&amp;
make</userinput></screen>

    <para>Now, as the <systemitem class="username">root</systemitem> user:</para>

<screen role="root"><userinput>make install</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para><command>make config</command>: Runs the interactive configuration 
    process. The first question prompts you for an 
    <quote><computeroutput>Installation directory</computeroutput></quote>. 
    Reply with <filename class="directory">/usr</filename>, as this is equivalent to 
    <application>Autoconf</application>'s <option>--prefix=/usr</option> parameter 
    to <command>configure</command>. For all other prompts, you may 
    press <keycap>Enter</keycap> to accept the (very sane) defaults. When 
    prompted for <quote><computeroutput>Number of daily data files to keep: 
    [7]</computeroutput></quote>, you may wish to keep a larger number of files.
    However, don't exceed 25 because <application>Sysstat</application> will
    resuse existing files the next month, leading to erroneous daily reports.</para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring Sysstat</title>

    <sect3>
     <title>Cron Information</title>

      <para>To begin gathering <application>Sysstat</application> history 
      information, you must add to, or create a privileged user's crontab. The 
      default history data location is 
      <filename class="directory">/var/log/sa</filename>. The user running 
      <application>Sysstat</application> utilities via cron must have write 
      access to this location.</para>

      <para>Below is an example of what to install in the crontab. Adjust the
      parameters to suit your needs. Use <command>man sa1</command> and
      <command>man sa2</command> for information about the commands.</para>

<screen><literal># 8am-7pm activity reports every 10 minutes during weekdays
0 8-18 * * 1-5 /usr/lib/sa/sa1 600 6 &amp;
 
# 7pm-8am activity reports every hour during weekdays
0 19-7 * * 1-5 /usr/lib/sa/sa1 &amp;
 
# Activity reports every hour on Saturday and Sunday
0 * * * 0,6 /usr/lib/sa/sa1 &amp;
 
# Daily summary prepared at 19:05
5 19 * * * /usr/lib/sa/sa2 -A &amp;</literal></screen>

    <para>Ensure you submit the revised crontab to the cron daemon.</para>

    </sect3>

    <sect3 id="sysstat-init">
      <title>System Startup Information</title>

      <indexterm zone="sysstat sysstat-init">
        <primary sortas="f-sysstat">sysstat</primary>
      </indexterm>

      <para>At system startup, a LINUX RESTART message must be inserted in the daily 
      data file to reinitialize the kernel counters. This can be automated by
      installing the <filename>/etc/rc.d/init.d/sysstat</filename> init script 
      included in the <xref linkend="intro-important-bootscripts"/> package using 
      the following command:</para>

<screen role="root"><userinput>make install-sysstat</userinput></screen>

    </sect3>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>iostat, mpstat, sar, sa1, sa2, and sadc</seg>
        <seg>None</seg>
        <seg>/usr/lib/sa and /var/log/sa</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="iostat">
        <term><command>iostat</command></term>
        <listitem>
          <para>reports <acronym>CPU</acronym> statistics and input/output 
          statistics for devices and partitions.</para>
          <indexterm zone="sysstat iostat">
            <primary sortas="b-iostat">iostat</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mpstat">
        <term><command>mpstat</command></term>
        <listitem>
          <para>reports individual or combined processor related statistics.</para>
          <indexterm zone="sysstat mpstat">
            <primary sortas="b-mpstat">mpstat</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="sar">
        <term><command>sar</command></term>
        <listitem>
          <para> collects, reports and saves system activity information.</para>
          <indexterm zone="sysstat sar">
            <primary sortas="b-sar">sar</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="sa1">
        <term><command>sa1</command></term>
        <listitem>
          <para>collects and stores binary data in the system activity daily 
          data file. It is a front end to <filename>sadc</filename> designed to be run 
          from cron.</para>
          <indexterm zone="sysstat sa1">
            <primary sortas="b-sa1">sa1</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="sa2">
        <term><command>sa2</command></term>
        <listitem>
          <para>writes a summarized daily activity report. It is a front end 
          to <command>sar</command> designed to be run from cron.</para>
          <indexterm zone="sysstat sa2">
            <primary sortas="b-sa2">sa2</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="sadc">
        <term><command>sadc</command></term>
        <listitem>
          <para>is the system activity data collector, used as a backend for 
          <command>sar</command>.</para>
          <indexterm zone="sysstat sadc">
            <primary sortas="b-sadc">sadc</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>