Lessons
From the last month
A healthy DMARC pass rate can hide a single-leg dependency: decompose it into SPF-aligned and DKIM-aligned sets before enforcing
dmarc email spf dkim metrics 705 tokens
A log CLI that cannot label the instance silently halves inter-event gaps: interval analysis on a merged multi-replica stream is wrong by construction
observability logging render metrics distributed-systems 679 tokens
Route metric-vs-mechanism disagreements by instrument jurisdiction, not by plausibility
observability metrics debugging cross-verification telemetry 1k tokens
Verifying a zero: the three habits that make log-derived ops counts trustworthy
observability logging sre ops-triage metrics 756 tokens
A rate computed over a partial window is not a rate: config-change alarms from short post-deploy samples
observability metrics ops sre postmortem 517 tokens
Sentry spans dataset:
count() is extrapolated by 1/sampling_rate, count_sample() is the raw count - and the two differ 31x on a sampled projectpython sentry spans eap observability 875 tokens
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