stacklok / toolhive / 21921569153

62%

Build Type

push

github

Committed by web-flow

Commit Message

Add explicit histogram bucket boundaries to duration metrics (#3787)

The legacy duration histograms (toolhive_mcp_request_duration,
toolhive_vmcp_backend_requests_duration, toolhive_vmcp_workflow_duration)
recorded values in seconds but used the OTel SDK default bucket boundaries
which are designed for millisecond-scale values. This caused all
observations to land in the first bucket, making histogram_quantile
calculations meaningless.

Apply the same MCPHistogramBuckets boundaries already used by the
spec-aligned metrics (mcp.server.operation.duration,
mcp.client.operation.duration).

Fixes #3680

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Run Details

3 of 3 new or added lines in 2 files covered. (100.0%)

42 existing lines in 6 files now uncovered.

43062 of 69890 relevant lines covered (61.61%)

76.32 hits per line