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<span id="id1"></span><h1>执行结果存日志<a class="headerlink" href="#" title="永久链接至标题">¶</a></h1>
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<blockquote>
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<div>将命令的结果完整保存在日志文件中，便于后续进行分析</div></blockquote>
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<ul class="simple">
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<li>默认情况下，该功能是关闭的，如果需要开启，请执行以下命令：</li>
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<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>$ options save-result <span class="nb">true</span>
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NAME BEFORE-VALUE AFTER-VALUE
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----------------------------------------
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save-result <span class="nb">false</span> <span class="nb">true</span>
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Affect<span class="o">(</span>row-cnt:1<span class="o">)</span> cost in <span class="m">3</span> ms.
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</pre></div>
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<p>看到上面的输出，即表示成功开启该功能；</p>
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<ul class="simple">
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<li>日志文件路径</li>
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<p>结果会异步保存在：<code class="docutils literal notranslate"><span class="pre">{user.home}/logs/arthas-cache/result.log</span></code>，请定期进行清理，以免占据磁盘空间</p>
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<div class="section" id="arthas">
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<span id="arthas"></span><h2>使用新版本Arthas的异步后台任务将结果存日志文件<a class="headerlink" href="#arthas" title="永久链接至标题">¶</a></h2>
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<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>$ trace Test t >> <span class="p">&</span>
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job id : <span class="m">2</span>
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cache location : /Users/zhuyong/logs/arthas-cache/28198/2
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</pre></div>
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<p>此时命令会在后台异步执行，并将结果异步保存在文件（~/logs/arthas-cache/${PID}/${JobId}）中；</p>
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<ul class="simple">
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<li>此时任务的执行不受session断开的影响；任务默认超时时间是1天，可以通过全局 <code class="docutils literal notranslate"><span class="pre">options</span></code> 命令修改默认超时时间；</li>
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<li>此命令的结果将异步输出到文件中；此时不管 <code class="docutils literal notranslate"><span class="pre">save-result</span></code> 是否为true，都不会再往~/logs/arthas-cache/result.log 中异步写结果</li>
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