使用phalcon框架，进行如下查询

public function getCarSeriesList($brandId, $start = 0, $count = 1000){

    $phql = "SELECT cs.*, b.* FROM Test\Common\Models\Entities\CarSeries cs LEFT JOIN Test\Common\Models\Entities\CarBrands b ON cs.brandId = b.id ";
    $condition = array();
    if(!empty($brandId)){

        $phql .= " WHERE cs.brandId = ?0 ";
        $condition[0] = $brandId;
    }
    $phql .= " ORDER BY cs.name_en ASC ";
    if(!empty($count)){

        $phql .= " LIMIT ?1, ?2";
        $condition[1] = $start;
        $condition[2] = $count;
    }

    $result = $this->modelsManager->executeQuery($phql, $condition);

    return $result->toArray();
}

结果php-fpm 进程报错：

2017/06/27 17:07:49 [error] 60709#0: *1028 FastCGI sent in stderr: "PHP message: PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 532692992 bytes) in /Users/tester/www/testserver/apps/backend/controllers/CarSeriesController.php on line 27" while reading response header from upstream, client: 127.0.0.1, server: local.test.me, request: "GET /series HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "admin.local.test.me"

已将php.ini的memory_limit的值，从128M修改为512M，依然会有这个问题。请问各位是否遇到过类似问题？