Comments (6)
RustedBones
commented on June 14, 2024
I think the issue comes from the histogram_quantile function. Seems in the doc it requires sum instead of average.
Can you curl the endpoint and paste the result you have for the akka_http_responses_duration_seconds_bucket metrics ? This will help for investigation.
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gunjdesai
commented on June 14, 2024
I did try using sum for the histogram_quantile function but it yields the same result.
The result of the metrics endpoint is as follows
# HELP akka_http_connections_active Active TCP connections
# TYPE akka_http_connections_active gauge
akka_http_connections_active 5.0
# HELP akka_http_requests_active Active HTTP requests
# TYPE akka_http_requests_active gauge
akka_http_requests_active 0.0
# HELP akka_http_responses_size_bytes HTTP response size
# TYPE akka_http_responses_size_bytes summary
akka_http_responses_size_bytes{quantile="0.75",} NaN
akka_http_responses_size_bytes{quantile="0.95",} NaN
akka_http_responses_size_bytes{quantile="0.98",} NaN
akka_http_responses_size_bytes{quantile="0.99",} NaN
akka_http_responses_size_bytes{quantile="0.999",} NaN
akka_http_responses_size_bytes_count 1.0
akka_http_responses_size_bytes_sum 81.0
# HELP akka_http_connections_total Total TCP connections
# TYPE akka_http_connections_total counter
akka_http_connections_total 218092.0
# HELP akka_http_responses_duration_seconds HTTP response duration
# TYPE akka_http_responses_duration_seconds histogram
akka_http_responses_duration_seconds_bucket{le="1.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="2.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="3.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="5.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="8.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="13.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="21.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="34.0",} 234400.0
akka_http_responses_duration_seconds_bucket{le="+Inf",} 234400.0
akka_http_responses_duration_seconds_count 234400.0
akka_http_responses_duration_seconds_sum 1.632999999999979
# HELP akka_http_responses_total HTTP responses
# TYPE akka_http_responses_total counter
akka_http_responses_total 234400.0
# HELP akka_http_requests_total Total HTTP requests
# TYPE akka_http_requests_total counter
akka_http_requests_total 234400.0
# HELP akka_http_requests_size_bytes HTTP request size
# TYPE akka_http_requests_size_bytes summary
akka_http_requests_size_bytes{quantile="0.5",} 0.0
akka_http_requests_size_bytes{quantile="0.75",} 0.0
akka_http_requests_size_bytes{quantile="0.9",} 0.0
akka_http_requests_size_bytes{quantile="0.95",} 0.0
akka_http_requests_size_bytes{quantile="0.99",} 0.0
akka_http_requests_size_bytes_count 234400.0
akka_http_requests_size_bytes_sum 425.0
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RustedBones
commented on June 14, 2024
Your buckets are actually miss-configured for your usage:
Buckets(1, 2, 3, 5, 8, 13, 21, 34)tells your smallest bucket is [0s, 1s[ which contains all of your requests.
You'll then not be able to precisely plot the quantiles.
If your timeout is 200ms, I would suggest to define your buckets more like
Buckets(
0.01, 0.02, 0.03, 0.04, 0.05 0.06, 0.07, 0.08, 0.09, 0.1,
0.11, 0.12, 0.13, 0.14, 0.15 0.16, 0.17, 0.18, 0.19, 0.2,
0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1
)from akka-http-metrics.
gunjdesai
commented on June 14, 2024
Oh ok, my bad. Let me try this out.
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RustedBones
commented on June 14, 2024
No worries. The example given in the README is not really meant to be used as is.
Settings is already configured with more sensible defaults here.
Just overwrite what you need.
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gunjdesai
commented on June 14, 2024
Worked like a dream. Thank you so much for your instant help. Really appreciate it.
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