95th percentile latency from histogram
p95 latency per job; note: always aggregate _bucket by le before histogram_quantile
histogram_quantile(0.95, sum by(le,job)(rate(http_request_duration_seconds_bucket[5m])))
- tool
- prometheus30 commands
More prometheus commands
-
predict_linear(node_filesystem_avail_bytes{mountpoint="/"}[6h], 4*3600) < 0alert when linear trend predicts disk full within 4h based on last 6h
-
absent(up{job="node"} == 1)fires when no series match; catches a job that vanished from discovery entirely
-
label_replace(node_uname_info, "host", "$1", "nodename", "(.+)")extract/derive a new label via regex capture; useful for joins and tidy dashboards
-
max_over_time(rate(node_network_receive_bytes_total[5m])[1h:1m])subquery: peak 5m rate sampled each minute over the last hour; spot bursts
-
sum without(instance) (rate(http_requests_total{code=~"5.."}[5m]))without() keeps every label except instance; cleaner than listing many by() labels