Method register

datafusion/execution/src/memory_pool/pool.rs:207–211

(&self, consumer: &MemoryConsumer)

    }

    fn register(&self, consumer: &MemoryConsumer) {
        if consumer.can_spill {
            self.state.lock().num_spill += 1;
        }
    }

    fn unregister(&self, consumer: &MemoryConsumer) {
        if consumer.can_spill {