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<p>You can configure the <a href="heron-architecture#topology-manager">Topology
Manager</a> (TM) for a topology
using the parameters below.</p>
<table>
<thead>
<tr><th style="text-align:left">Parameter</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.tmanager.metrics.collector.maximum.interval.min</code></td><td style="text-align:left">The maximum interval, in minutes, for metrics to be kept in the Topology Manager</td><td style="text-align:left">180</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.establish.retry.times</code></td><td style="text-align:left">The maximum time to retry to establish the Topology Manager</td><td style="text-align:left">30</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.establish.retry.interval.sec</code></td><td style="text-align:left">The interval to retry to establish the Topology Manager</td><td style="text-align:left">1</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.network.server.options.maximum.packet.mb</code></td><td style="text-align:left">The maximum packet size, in megabytes, of the Topology Manager's network options for Stream Managers to connect to</td><td style="text-align:left">16</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.network.controller.options.maximum.packet.mb</code></td><td style="text-align:left">The maximum packet size, in megabytes, of the Topology Manager's network options for scheduler to connect to</td><td style="text-align:left">1</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.network.stats.options.maximum.packet.mb</code></td><td style="text-align:left">The maximum packet size, in megabytes, of the Topology Manager's network options for stat queries</td><td style="text-align:left">1</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.metrics.collector.purge.interval.sec</code></td><td style="text-align:left">The interval, in seconds, at which the Topology Manager purges metrics from the socket</td><td style="text-align:left">60</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.metrics.collector.maximum.exception</code></td><td style="text-align:left">The maximum number of exceptions to be stored in the topology's metrics collector, to prevent potential out-of-memory issues</td><td style="text-align:left">256</td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.metrics.network.bindallinterfaces</code></td><td style="text-align:left">Whether the metrics reporter binds on all interfaces</td><td style="text-align:left"><code>False</code></td></tr>
<tr><td style="text-align:left"><code>heron.tmanager.stmgr.state.timeout.sec</code></td><td style="text-align:left">The timeout, in seconds, for the Stream Manager, compared with (current time - last heartbeat time)</td><td style="text-align:left">60</td></tr>
</tbody>
</table>
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