Check if this issue is valid — if so, understand the root cause and fix it. At docs/netdata-agent/sizing-netdata-agents/disk-requirements-and-retention.md, line 76:

<comment>The worked example mixes GB and GiB units: 15,552,000,000 bytes is about 14.5 GiB, not 15.6 GiB.</comment>

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@@ -49,6 +49,40 @@ In practice, with default settings and an ingestion rate of about 4,000 metrics
+For a system collecting **10,000 metrics per second** with a **30-day retention** for `tier0`:
+
+1. Calculate seconds in 30 days: 30 days × 24 hours × 60 minutes × 60 seconds = **2,592,000 seconds**
+2. Apply the formula: 10,000 × 2,592,000 × 0.6 = **15,552,000,000 bytes** ≈ **15.6 GiB**
+
+:::note
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