Convert a deadlock incident into a root-cause fix and prevention action.
Order processing hit 314 deadlock errors because two services updated the same tables in different transaction orders. Blameless postmortem plus Five Whys: facts, causes, system condition, concrete prevention Stopping at "deadlocks happen under load" leaves the system unchanged and turns the incident into recurring toil. State impact 314 deadlock errors delayed 1,860 orders for nine minutes; automatic retries recovered 73 percent and manual replay handled the rest. Impact keeps the review anchored in customer and operational harm, not personal blame. Trace facts Deadlock logs show Service A updates orders then inventory_reservations; Service B updates inventory_reservations then orders. The DBA uses…
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