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  <div class="section" id="log">
<h1>8.13. Log<a class="headerlink" href="#log" title="このヘッドラインへのパーマリンク">¶</a></h1>
<p>Groonga has two log files. They are process log and query
log. Process log is for all of <a class="reference internal" href="executables/groonga.html"><em>groongaコマンド</em></a>
works. Query log is just for query processing.</p>
<div class="section" id="process-log">
<span id="id1"></span><h2>8.13.1. Process log<a class="headerlink" href="#process-log" title="このヘッドラインへのパーマリンク">¶</a></h2>
<p>Process log is enabled by default. Log path can be
customized by <a class="reference internal" href="executables/groonga.html#cmdoption--log-path"><em class="xref std std-option">--log-path</em></a> option.  Each log has its
log level. If a log is smaller than groonga process' log
level, it's not logged. Log level can be customized by
<a class="reference internal" href="executables/groonga.html#cmdoption-l"><em class="xref std std-option">-l</em></a> or <a class="reference internal" href="commands/log_level.html"><em>log_level</em></a>.</p>
<div class="section" id="format">
<h3>8.13.1.1. フォーマット<a class="headerlink" href="#format" title="このヘッドラインへのパーマリンク">¶</a></h3>
<p>Process log uses the following format:</p>
<div class="highlight-none"><div class="highlight"><pre>#{TIME_STAMP}|#{L}| #{MESSAGE}
</pre></div>
</div>
<dl class="docutils">
<dt>TIME_STAMP</dt>
<dd><p class="first">It's time stamp uses the following format:</p>
<div class="highlight-none"><div class="highlight"><pre>YYYY-MM-DD hh:mm:ss.SSSSSS
</pre></div>
</div>
<dl class="docutils">
<dt>YYYY</dt>
<dd>Year with four digits.</dd>
<dt>MM</dt>
<dd>Month with two digits.</dd>
<dt>DD</dt>
<dd>Day with two digits.</dd>
<dt>hh</dt>
<dd>Hour with two digits.</dd>
<dt>mm</dt>
<dd>Minute with two digits.</dd>
<dt>ss</dt>
<dd>Second with two digits.</dd>
<dt>SSSSSS</dt>
<dd>Microsecond with six digits.</dd>
</dl>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>2011-07-05 06:25:18.345734
</pre></div>
</div>
</dd>
<dt>L</dt>
<dd><p class="first">Log level with a character. Here is a character and log
level map.</p>
<dl class="docutils">
<dt>E</dt>
<dd>Emergency</dd>
<dt>A</dt>
<dd>Alert</dd>
<dt>C</dt>
<dd>Critical</dd>
<dt>e</dt>
<dd>Error</dd>
<dt>w</dt>
<dd>Warning</dd>
<dt>n</dt>
<dd>Notification</dd>
<dt>i</dt>
<dd>Information</dd>
<dt>d</dt>
<dd>Debug</dd>
<dt>-</dt>
<dd>Dump</dd>
</dl>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>E
</pre></div>
</div>
</dd>
<dt>MESSAGE</dt>
<dd><p class="first">Details about the log with free format.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>log opened.
</pre></div>
</div>
</dd>
</dl>
<p>実行例:</p>
<div class="highlight-none"><div class="highlight"><pre>2011-07-05 08:35:09.276421|n| grn_init
2011-07-05 08:35:09.276553|n| RLIMIT_NOFILE(4096,4096)
</pre></div>
</div>
</div>
</div>
<div class="section" id="query-log">
<span id="id2"></span><h2>8.13.2. Query log<a class="headerlink" href="#query-log" title="このヘッドラインへのパーマリンク">¶</a></h2>
<p>Query log is disabled by default. It can be enabled by
<a class="reference internal" href="executables/groonga.html#cmdoption--query-log-path"><em class="xref std std-option">--query-log-path</em></a> option.</p>
<div class="section" id="id3">
<h3>8.13.2.1. フォーマット<a class="headerlink" href="#id3" title="このヘッドラインへのパーマリンク">¶</a></h3>
<p>Query log uses the following formats:</p>
<div class="highlight-none"><div class="highlight"><pre>#{TIME_STAMP}|#{MESSAGE}
#{TIME_STAMP}|#{ID}|&gt;#{QUERY}
#{TIME_STAMP}|#{ID}|:#{ELAPSED_TIME} #{PROGRESS}
#{TIME_STAMP}|#{ID}|&lt;#{ELAPSED_TIME} #{RETURN_CODE}
</pre></div>
</div>
<dl class="docutils">
<dt>TIME_STAMP</dt>
<dd><p class="first">It's time stamp uses the following format:</p>
<div class="highlight-none"><div class="highlight"><pre>YYYY-MM-DD hh:mm:ss.SSSSSS
</pre></div>
</div>
<dl class="docutils">
<dt>YYYY</dt>
<dd>Year with four digits.</dd>
<dt>MM</dt>
<dd>Month with two digits.</dd>
<dt>DD</dt>
<dd>Day with two digits.</dd>
<dt>hh</dt>
<dd>Hour with two digits.</dd>
<dt>mm</dt>
<dd>Minute with two digits.</dd>
<dt>ss</dt>
<dd>Second with two digits.</dd>
<dt>SSSSSS</dt>
<dd>Microsecond with six digits.</dd>
</dl>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>2011-07-05 06:25:18.345734
</pre></div>
</div>
</dd>
<dt>ID</dt>
<dd><p class="first">ID of a thread. Groonga process creates threads to process
requests concurrently. Each thread outputs some logs for a
request. This ID can be used to extract a log sequence by
a thread.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>45ea3034
</pre></div>
</div>
</dd>
</dl>
<dl class="docutils">
<dt>&gt;</dt>
<dd>A character that indicates query is started.</dd>
</dl>
<dl class="docutils">
<dt>:</dt>
<dd>A character that indicates query is processing.</dd>
</dl>
<dl class="docutils">
<dt>&lt;</dt>
<dd>A character that indicates query is finished.</dd>
<dt>MESSAGE</dt>
<dd><p class="first">Details about the log with free format.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>query log opened.
</pre></div>
</div>
</dd>
<dt>QUERY</dt>
<dd><p class="first">A query to be processed.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>select users --match_columns hobby --query music
</pre></div>
</div>
</dd>
<dt>ELAPSED_TIME</dt>
<dd><p class="first">Elapsed time in nanoseconds since query is started.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>000000000075770
(It means 75,770 nanoseconds.)
</pre></div>
</div>
</dd>
<dt>PROGRESS</dt>
<dd><p class="first">A processed work at the time.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>select(313401)
(It means that &#39;select&#39; is processed and 313,401 records are remained.)
</pre></div>
</div>
</dd>
<dt>RETURN_CODE</dt>
<dd><p class="first">A return code for the query.</p>
<p>実行例:</p>
<div class="last highlight-none"><div class="highlight"><pre>rc=0
(It means return code is 0. 0 means GRN_SUCCESS.)
</pre></div>
</div>
</dd>
</dl>
<p>実行例:</p>
<div class="highlight-none"><div class="highlight"><pre>2011-07-05 06:25:19.458756|45ea3034|&gt;select Properties --limit 0
2011-07-05 06:25:19.458829|45ea3034|:000000000072779 select(19)
2011-07-05 06:25:19.458856|45ea3034|:000000000099998 output(0)
2011-07-05 06:25:19.458875|45ea3034|&lt;000000000119062 rc=0
2011-07-05 06:25:19.458986|45ea3034|&gt;quit
</pre></div>
</div>
</div>
</div>
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  <h3><a href="../index.html">目次</a></h3>
  <ul>
<li><a class="reference internal" href="#">8.13. Log</a><ul>
<li><a class="reference internal" href="#process-log">8.13.1. Process log</a><ul>
<li><a class="reference internal" href="#format">8.13.1.1. フォーマット</a></li>
</ul>
</li>
<li><a class="reference internal" href="#query-log">8.13.2. Query log</a><ul>
<li><a class="reference internal" href="#id3">8.13.2.1. フォーマット</a></li>
</ul>
</li>
</ul>
</li>
</ul>

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