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Human-readable text-based
Metrics entries: TYPE and HELP attributes
HELP -> description of what metric is
TYPE
COUNTER: how many times X happened
GAUGE: what is a current value of x now
HISTOGRAM: how long or how big
single node, self containing -> hard to scale
Some apps/components have /metrics endpoint (e.g. Spring actuator), but some not. E.g. MySQL, Linux. This is how it is working (Exporters list HERE):
/metrics
