Software1 hOctober 15, 2026, 23:20

CircleCI outage: PostgreSQL WAL saturation blocked 3,500 job starts

On October 6, 2026, CircleCI suffered a 50-minute outage of its PostgreSQL orchestration database after an anti-wraparound autovacuum generated WAL faster than it could be archived, filling the disk. About 3,500 job starts failed even though runners were healthy.

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CircleCI outage: PostgreSQL WAL saturation blocked 3,500 job starts

PostgreSQL orchestration database was down for 50 minutes
About 3,500 job starts failed during the outage
Autovacuum generated WAL faster than archival could keep up
Recovery took hours due to the queued job backlog

#CircleCI#PostgreSQL

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