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zackpollard
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Apr 12, 2026
…r crashes two fixes for the exceededResources crash loop that caused metric gaps: 1) cold-start backfill: when the isolate was just created (age < 2min), widen the collection window from 3 minutes to 15 minutes. this catches any data missed while the previous isolate was crash-looping. victoriametrics dedupes on (series, timestamp) so overlap is free. the cron_summary metric now includes a cold_start field so the exporter-health dashboard can show when backfills happen. 2) new alert "Collector Worker Crash Rate" (rule #8): queries cf_workers_invocations_errors for the collector's own script name. this data comes from cloudflare's analytics api (not our self- telemetry), so it's written by whichever tick succeeds after the crashes. fires when >3 errors in a 30-minute window, severity 1. this catches the "mostly failing" state that the existing liveness alert missed — a few successful ticks per 10 minutes were enough to keep cron_summary present and prevent NoData.
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