Added endpoint to see caching metrics from grafana/prometheus #1678
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AbrarQuazi
commented
Feb 26, 2025
| use lazy_static::lazy_static; | ||
| use prometheus::{register_counter, register_histogram, Counter, Histogram}; | ||
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| lazy_static! { |
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prometheus should be able to hit the /metrics endpoint and scrape data for the following pomql queries to show in grafana dashboards:
// query for average hits per second over specified times
rate(cache_hits[5m]) #or alternatively total hits over specified time: increase(cache_hits[5m])
// query for average misses per second over specified times
rate(cache_misses[5m])
// query for hit ratio over specified time
sum(increase(cache_hits[5m])) / sum(increase(cache_hits[5m]) + increase(cache_misses[5m]))
// query for rolling average latency
rate(hit_latency_ms_sum[5m]) / rate(hit_latency_ms_count[5m])
rate(miss_latency_ms_sum[5m]) / rate(miss_latency_ms_count[5m])
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This PR exposes an endpoint to see cache metrics such as cache hits, misses and latency information which prometheus can scrape for grafana dashboarding