Micrometer Cardinality Control

Quick Start

For any metric with dynamic tags, apply this pattern:

// ❌ Dangerous: unbounded cardinality
.tag("supplier.id", supplierId) // 10,000+ unique values

// ✅ Safe: normalized to bounded categories
.tag("supplier.category", normalizeSupplier(supplier)) // 5-10 values

private String normalizeSupplier(Supplier s) {
    if (s.isTopTier()) return "tier1";
    if (s.isDirectSupplier()) return "direct";
    return "standard";
}