---
type: Monitoring Guide
title: "How to Monitor CPU Usage via SNMP (Step by Step)"
description: "Walk hrProcessorLoad, average cores, optional load average, multi-sample thresholds."
resource: "https://snmp-monitoring.info/monitoring/server/cpu/"
tags: [monitoring]
timestamp: 2026-07-10T00:00:00Z
---

# How to Monitor CPU Usage via SNMP (Step by Step)

Walk hrProcessorLoad, average cores, optional load average, multi-sample thresholds.

## Related concepts

- Up: [SNMP Server Monitoring: CPU, RAM, Disk & Uptime](/monitoring/server/index.md)

## Frequently asked questions

### What OID is CPU usage in SNMP?

Servers with HOST-RESOURCES: 1.3.6.1.2.1.25.3.3.1.2 (hrProcessorLoad), per core, 0–100. No universal total leaf—average the rows. Routers and weird appliances may only speak vendor enterprise OIDs; walk first, template second.

### How do I check CPU load via SNMP?

snmpwalk -v2c -c <RO_string> <host> 1.3.6.1.2.1.25.3.3.1.2 For load average instead of percent (Net-SNMP/UCD): snmpwalk -v2c -c <RO_string> <host> 1.3.6.1.4.1.2021.10.1.3 When the CLI is clean, point the NMS at the same OIDs.

### How do I average CPU across cores?

Sum every hrProcessorLoad instance, divide by how many you got. That's host-level utilization for that sample. Track max core on the side if single-thread stalls matter.

### CPU load vs utilization—what's the difference?

Utilization here ≈ percent busy (hrProcessorLoad). Load average ≈ how much runnable work is stacked (not capped at 100). You can have "okay" percent with nasty load if things wait, or high percent with load that still matches CPU count on a well-sized box. If the agent exposes both, graph both.

## Source

Concept generated from https://snmp-monitoring.info/monitoring/server/cpu/ — the SNMP Monitoring vendor-neutral knowledge base. Content is limited to what that page states (no external claims added here).