laravle model 内存溢出，model使用完毕会主动释放吗

用swoole配合laravle的mysql驱动
Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /vendor/illuminate/database/Eloquent/Model.php on line 294.

突然冒出来这个报错，，请问是单次请求数据量过大 还是model实例化之后不释放堆积了