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Demote tier2 refusal + ResourceExhausted logs to cut Cloud Logging volume - #962
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Cuts Cloud Logging volume on substreams-workers: these two log lines accounted for ~37% of sampled bytes on every backpressure refusal. Refusal rate/reason stays visible via substreams_tier2_rejected_request_counter. Bumps dgrpc to pick up server.WithCodeLevelFunc (streamingfast/dgrpc#38) and uses it to demote ResourceExhausted on tier2's gRPC server while keeping its default code-to-level mapping for every other code.
🔍 Vulnerabilities of
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| digest | sha256:b6d79573db407e09f6cdd6599870616935bd9bc18315b459ca579b4d900dc2fd |
| vulnerabilities |     |
| platform | linux/amd64 |
| size | 125 MB |
| packages | 380 |
📦 Base Image ubuntu:24.04
| also known as |
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| digest | sha256:496754492fb28b4d3049432f2ca787449331e23fb14f0dd3fffea86bf5a93eb4 |
| vulnerabilities |   |
sduchesneau
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Sep 29, 2026
sduchesneau
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LGTM no problem, we have counters for debugging, and the tier1's point of view too.
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substreams-workers(~20% of sampled bytes), logged at Info on every backpressure refusal.service/tier2.goto Debug. Refusal rate/reason is already tracked by the existingsubstreams_tier2_rejected_request_counterPrometheus metric, so no operational signal is lost.dgrpc, not this repo. Spawned a linked session againstdgrpcwhich addedserver.WithCodeLevelFunc(merged, Let callers override gRPC-code-to-zap-level mapping dgrpc#38); bumped the dependency here and wired tier2's gRPC server to demoteResourceExhaustedto Debug while keeping the rest of dgrpc's default code-to-level mapping.dmeteringthat also showed up in the sample were already demoted to Debug by a prior commit already on this branch (d56dc47d); the Sept 27 sample likely predates that fix reaching production.