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58 lines
3.1 KiB
HTML
58 lines
3.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>获取系统的负载（load average）</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.sys-getloadavg" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">sys_getloadavg</h1>
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<p class="verinfo">(PHP 5 >= 5.1.3, PHP 7)</p><p class="refpurpose"><span class="refname">sys_getloadavg</span> — <span class="dc-title">获取系统的负载（load average）</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.sys-getloadavg-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>sys_getloadavg</strong></span>
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( <span class="methodparam">void</span>
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) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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返回三个系统负载（系统运行队列中的进程数）的样本数据，分别是1分钟、5分钟和15分钟之前。
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.sys-getloadavg-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回一个包含1分钟、5分钟和15分钟之前采样数据的<span class="type"><a href="language.types.array.html" class="type array">array</a></span>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.sys-getloadavg-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-4549">
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<p><strong>Example #1 <span class="function"><strong>sys_getloadavg()</strong></span> 的例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$load </span><span style="color: #007700">= </span><span style="color: #0000BB">sys_getloadavg</span><span style="color: #007700">();<br />if (</span><span style="color: #0000BB">$load</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">] > </span><span style="color: #0000BB">80</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'HTTP/1.1 503 Too busy, try again later'</span><span style="color: #007700">);<br /> die(</span><span style="color: #DD0000">'Server too busy. Please try again later.'</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.sys-getloadavg-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数未在 Windows 平台下实现。</span></p></blockquote>
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</div>
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</div></div></div></body></html> |