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# A metric with label filtering
go_gc_duration_seconds{instance="localhost:9090", job="alertmanager"}
# Aggregation operators
sum by (app, proc) (
instance_memory_limit_bytes - instance_memory_usage_bytes
) / 1024 / 1024
# Metric with multiple lables and whitespaces
go_gc_duration_seconds{ instance="localhost:9090", job="alertmanager" }
# Expression and comment
go_gc_duration_seconds{instance="localhost:9090"} # single comment
# Delta function
delta(cpu_temp_celsius{host="zeus"}[2h])
# Sum with arguments
sum by (app, proc) (instance_memory_usage_bytes)
# Multi-line with offset
label_replace(
avg by(instance)
(irate(node_cpu_seconds_total{mode = "idle"}[5m] offset 3s)
) * 100,
"device",
"cpu",
"instance",
".*"
)
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