如何检查Guzzle 5的进展情况

Question

I use Guzzle 5 to get data from api and insert into database. After run this php code I use another ajax call which get's current progress. The problem is that ajax call return value after script finish. So it is always 100%. Is there a way I can get insert progress ?

    $client = new GuzzleHttp\Client([
        'base_url' => $domain
    ]);

    $params = [];


    $requests[] = $client->createRequest('GET', '?' . http_build_query($params));

    GuzzleHttp\Pool::send($client, $requests, [
        'pool_size' => 10,
        'complete' => function (CompleteEvent $event) {
                $this->insertData();
            }
        },
        'error' => function (ErrorEvent $event) {
            $this->handleError($error);
        }
    ]);

It look like database is busy that's why I can't get progress data which I store in database.