Kinds of Metrics
Not all numbers behave the same way.
Watch closely. The differences matter.
e.g. total checkout requests
e.g. connection pool — active connections
e.g. checkout latency distribution
Name each chart based on its behavior
Chart A
Chart B
Chart C
You need to know if most requests are fast or if there are slow outliers. Which metric type?
Counter counts. Gauge measures a current level. Histogram reveals the shape.
Choose the type that matches the question you need to answer.
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