src: Pode ser possível adiar a reconfiguração do núcleo diminuindo shared_buffers, para reduzir o consumo de memória compartilhada pelo PostgreSQL, e/ou reduzindo max_connections, para reduzir o consumo de semáforos.
tgt: You might be able to postpone reconfiguring your kernel by decreasing shared_buffers to reduce the shared memory consumption of Postgres-XC, and/or by reducing max_connections to reduce the semaphore consumption.