https://blog.no42.org/tags/capacity-planning/ Recent content in Capacity-Planning on №42 Hugo en Wed, 09 Sep 2026 00:00:00 +0000 https://blog.no42.org/article/breaking-opennms-collection-snmp/ Wed, 09 Sep 2026 00:00:00 +0000 https://blog.no42.org/article/breaking-opennms-collection-snmp/ <p>The most common question I get about OpenNMS at scale is some version of this: I have a lot of network equipment, I want SNMP performance data from all of it, how big does the box need to be? The honest answer used to be &ldquo;it depends&rdquo;, followed by a shrug about agent behavior.</p> <p>What I reached for in those situations was the instrumentation log reader. It tells you two things about a running system: how long it takes to collect metrics from your agents, and how long it takes to persist them. The node inventory matters just as much. It tells you the node-to-interface ratio and how the metric collection is composed in your environment.</p>