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[Server] Drop dead Prometheus histogram, add developer command metrics, fix watchdog init order

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- metrics_registry: remove toPrometheusText/appendCumulativeBuckets and the time-bucket histogram that nothing in production ever emitted (the future /metrics exporter can bring it back); keep counts/totals read by the Developer tab
- Fix +Inf bucket routing that never incremented, and its test that locked the bug in
- Instrument developer_command container (kind 6) in processCommandContainer and stats label resolution
- Read metrics/{slow_command_ms,stall_warn_ms} at the top of initServer() so stall_warn_ms=0 disables the watchdogs before pool threads start
- Shrink KindStride to 1280 (largest extension in use is 1206) with a static_assert; document scrape cost of getCardsInGamesTotal; note slow_command logging has no rate limit in servatrice.ini.example
This commit is contained in:
Lukas Brübach 2026-08-30 23:22:40 +02:00
parent 26c0484297
commit 9fc0218be7
7 changed files with 54 additions and 187 deletions
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4
servatrice/servatrice.ini.example
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@ -384,7 +384,9 @@ max_comments_per_hour=30
[metrics]
; Command containers that take longer than this many milliseconds are logged
; as slow commands. Set to 0 to disable the log line.
; as slow commands. Set to 0 to disable the log line. A latency spike produces
; one warning per slow container with no rate limiting of its own -- a bad
; patch can briefly flood the log, which is how you notice it.
slow_command_ms=500
; Each socket pool thread runs a watchdog heartbeat. If a heartbeat arrives