我先导入了1.3MB的excel没有问题，但是随后导入一个800KB的却提示大小超出限制了

导入代码

public function collection(Collection $rows)
{
    unset($rows[0]);
    foreach ($rows as $row) {
        School::create([
        'name' => $row[0],
        'major_code' => $row[1],
        'major' => $row[2],
        'lowest_order' => $row[3],
        'ask' => $row[4],
        'subject' => (string) $row[5],
        'least_subject' => $row[6],
        'subject_num' => $row[7],
        'type1' => (string)$row[8],
        'arwu' => $row[9],
        'city' => $row[10],
        ]);
    }
}

错误信息

{
    "message": "Allowed memory size of 536870912 bytes exhausted (tried to allocate 83886080 bytes)",
    "exception": "Symfony\\Component\\ErrorHandler\\Error\\FatalError",
    "file": "D:\\laragon\\www\\xuexiaochaxun\\vendor\\maatwebsite\\excel\\src\\Cache\\MemoryCache.php",
    "line": 97,
    "trace": []
}