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fleet/changes/issue-2656-update-prometheus
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* Update to the latest version of the prometheus Go client library, resulting in some breaking changes in the exported metrics:
- `http_request_duration_microseconds` which was a Summary metric aggregated per quantile is now `http_request_duration_seconds_bucket`, an Histogram metric aggregated per bucket, with the buckets being `.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10`
- `http_request_duration_microseconds_sum` is now `http_request_duration_seconds_sum`
- `http_request_duration_microseconds_count` is now `http_request_duration_seconds_count`
- `http_request_size_bytes` which was a Summary metric aggregated per quantile is now `http_request_size_bytes_bucket`, an Histogram metric aggregated per bucket, with the buckets being `1KB, 100KB, 1MB, 100MB, 1GB`
- `http_response_size_bytes` which was a Summary metric aggregated per quantile is now `http_response_size_bytes_bucket`, an Histogram metric aggregated per bucket, with the buckets being `1KB, 100KB, 1MB, 100MB, 1GB`