Why Can't Metrics Prefixed with aom_prom_fixed Be Discarded?

Symptom

Metrics prefixed with aom_prom_fixed_ cannot be discarded on the Metric Management page. In addition, these metrics are billed when being reported to AOM.

Possible Cause

For custom metrics named after Prometheus functions (such as count, max, min, avg, sum, count_values, stddev, stdvar, group, bottomk, topk, or quantile) or operators (such as and, or, or unless), AOM will add the prefix aom_prom_fixed_ to them when they are being reported to AOM to avoid PromQL query errors. For example, the original name of a custom metric is count and will be automatically converted to aom_prom_fixed_count when being reported. Due to name inconsistency, this metric fails to be discarded.

Solution

Do not use any Prometheus function (such as count, max, min, avg, sum, count_values, stddev, stdvar, group, bottomk, topk, or quantile) or operator (such as and, or, or unless) as metric names. Name custom metrics in the format of "xxx_xxx_xxx".