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Node.js (1)
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<h1>Node.js v4.2.6 Documentation</h1>
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<h2>Table of Contents</h2>
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<li><a href="#v8_v8">V8</a><ul>
<li><a href="#v8_getheapstatistics">getHeapStatistics()</a></li>
<li><a href="#v8_setflagsfromstring_string">setFlagsFromString(string)</a></li>
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<h1>V8<span><a class="mark" href="#v8_v8" id="v8_v8">#</a></span></h1>
<pre class="api_stability_2">Stability: 2 - Stable</pre><p>This module exposes events and interfaces specific to the version of <a href="https://code.google.com/p/v8/">V8</a>
built with Node.js. These interfaces are subject to change by upstream and are
therefore not covered under the stability index.
</p>
<h2>getHeapStatistics()<span><a class="mark" href="#v8_getheapstatistics" id="v8_getheapstatistics">#</a></span></h2>
<p>Returns an object with the following properties
</p>
<pre><code>{
total_heap_size: 7326976,
total_heap_size_executable: 4194304,
total_physical_size: 7326976,
total_available_size: 1152656,
used_heap_size: 3476208,
heap_size_limit: 1535115264
}</code></pre>
<h2>setFlagsFromString(string)<span><a class="mark" href="#v8_setflagsfromstring_string" id="v8_setflagsfromstring_string">#</a></span></h2>
<p>Set additional V8 command line flags. Use with care; changing settings
after the VM has started may result in unpredictable behavior, including
crashes and data loss. Or it may simply do nothing.
</p>
<p>The V8 options available for a version of Node.js may be determined by running
<code>node --v8-options</code>. An unofficial, community-maintained list of options
and their effects is available <a href="https://github.com/thlorenz/v8-flags/blob/master/flags-0.11.md">here</a>.
</p>
<p>Usage:
</p>
<pre><code>// Print GC events to stdout for one minute.
const v8 = require('v8');
v8.setFlagsFromString('--trace_gc');
setTimeout(function() { v8.setFlagsFromString('--notrace_gc'); }, 60e3);</code></pre>
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