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<p>You can configure all of the <a href="heron-architecture#metrics-manager">Metrics
Managers</a> (MMs) in a topology
using the parameters below.</p>
<h2><a class="anchor" aria-hidden="true" id="network-configuration"></a><a href="#network-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Network Configuration</h2>
<p>You can configure how the MM collects and transmits data in one (but only one)
of two ways: <strong>time based</strong> or <strong>size based</strong>. If you choose time based, you can
specify the maximum batch time (in milliseconds) for reading from and writing to
the MM's socket; if you choose size based, you can specify maximum batch sizes
(in bytes) instead.</p>
<h3><a class="anchor" aria-hidden="true" id="time-based-configuration"></a><a href="#time-based-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Time-based Configuration</h3>
<table>
<thead>
<tr><th style="text-align:left">Config</th><th style="text-align:left">Meaning</th><th style="text-align:left">Default</th></tr>
</thead>
<tbody>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.read.batch.time.ms</code></td><td style="text-align:left">The maximum batch time in milliseconds for the MM to read from the socket</td><td style="text-align:left">16</td></tr>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.write.batch.time.ms</code></td><td style="text-align:left">The maximum batch time in milliseconds for the MM to write to the socket</td><td style="text-align:left">16</td></tr>
</tbody>
</table>
<h3><a class="anchor" aria-hidden="true" id="size-based-configuration"></a><a href="#size-based-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Size-based Configuration</h3>
<table>
<thead>
<tr><th style="text-align:left">Config</th><th style="text-align:left">Meaning</th><th style="text-align:left">Default</th></tr>
</thead>
<tbody>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.read.batch.size.bytes</code></td><td style="text-align:left">Size based, the maximum batch size in bytes to read from socket</td><td style="text-align:left">32768</td></tr>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.write.batch.size.bytes</code></td><td style="text-align:left">Size based, the maximum batch size in bytes to write to socket</td><td style="text-align:left">32768</td></tr>
</tbody>
</table>
<h2><a class="anchor" aria-hidden="true" id="buffer-configuration"></a><a href="#buffer-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Buffer Configuration</h2>
<p>Each MM instance has a socket buffer for reading and writing metrics data. You
can set maximum buffer sizes for both send and receive buffers.</p>
<table>
<thead>
<tr><th style="text-align:left">Config</th><th style="text-align:left">Meaning</th><th style="text-align:left">Default</th></tr>
</thead>
<tbody>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.options.socket.send.buffer.size.bytes</code></td><td style="text-align:left">The maximum socket's send buffer size in bytes</td><td style="text-align:left">6553600</td></tr>
<tr><td style="text-align:left"><code>heron.metricsmgr.network.options.socket.received.buffer.size.bytes</code></td><td style="text-align:left">The maximum socket's received buffer size in bytes of the metrics manager's network options</td><td style="text-align:left">8738000</td></tr>
</tbody>
</table>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/cluster-config-instance"><span class="arrow-prev">← </span><span>Heron Instance</span></a><a class="docs-next button" href="/docs/cluster-config-stream"><span>Stream Manager</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#network-configuration">Network Configuration</a><ul class="toc-headings"><li><a href="#time-based-configuration">Time-based Configuration</a></li><li><a href="#size-based-configuration">Size-based Configuration</a></li></ul></li><li><a href="#buffer-configuration">Buffer Configuration</a></li></ul></nav></div><footer class="nav-footer" id="footer"><div class="apache-disclaimer">Apache Heron is an effort undergoing incubation at <a target="_blank" href="https://apache.org/">The Apache Software Foundation (ASF)</a> sponsored by the Apache Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.<br/><br/>Apache®, the names of Apache projects, and the feather logo are either <a rel="external" href="https://www.apache.org/foundation/marks/list/">registered trademarks or trademarks</a> of the Apache Software Foundation in the United States and/or other countries.<br/><br/><div class="copyright-box">Copyright © 2023 the Apache Software Foundation, Apache Heron, Heron, 
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