diff --git a/apps/api/internal/store/admission_queue.go b/apps/api/internal/store/admission_queue.go
index 21426ed..0392c0c 100644
--- a/apps/api/internal/store/admission_queue.go
+++ b/apps/api/internal/store/admission_queue.go
@@ -151,6 +151,16 @@ func (s *Store) queueTaskAdmissionOnce(
 		return TaskAdmission{}, err
 	}
 	defer rollbackTransaction(tx)
+	// The task itself was synchronously committed before this derived FIFO
+	// registration. Do not serialize a large media burst on one cross-region
+	// synchronous commit per waiting row: PostgreSQL still writes this WAL
+	// locally, and generic queued-task recovery reconstructs a registration
+	// after failover if the small asynchronous-commit window is hit. Admission,
+	// River job, execution lease, task state, and billing commits stay fully
+	// synchronous.
+	if _, err := tx.Exec(ctx, `SET LOCAL synchronous_commit = off`); err != nil {
+		return TaskAdmission{}, err
+	}
 
 	if err := tryAdmissionTransactionLock(ctx, tx, "task-admission:"+input.TaskID); err != nil {
 		return TaskAdmission{}, err