4 articles in applied systems › post-mortems.
A structured post-mortem of the November 2020 AWS US-East-1 Kinesis outage that cascaded to Cognito, CloudWatch, Lambda, and dozens of dependent services.
A structured post-mortem of the July 2024 CrowdStrike Falcon sensor update that caused 8.5 million Windows hosts to blue-screen simultaneously, grounding flights and disrupting hospitals.
A post-mortem of GitHub's extended MySQL replication lag incident, where a schema migration on a large table caused persistent replica lag affecting read traffic for hours.
A post-mortem of a Slack incident where database connection pool exhaustion caused message delivery delays affecting millions of users, with lessons on connection pool sizing.