swoole占用内存到10M报错

1.问题描述
使用swoole作为服务端对接一个考勤机硬件,使用单进程,从mysql数据库里面读取用户数据,当一次性读取的用户数量大于3000的时候读取就会报错,此时内存占用到10M左右,用户数据为基本信息,无长数据字段(name,userid,face_img(人脸地址)),请问下设置那个参数可以扩大这个限制?

2.问题出现的环境背景及自己尝试过哪些方法
swoole 版本: 4.4.6
thinkphp版本: thinkphp5.1.38 LTS
mysql版本 5.7

打印输出定位问题位置,
在onWorkerStart中 设置内存大小为128M ini_set('memory_limit','128M');

相关代码
// 请把代码文本粘贴到下方（请勿用图片代替代码）

$user = Main::getRecord('db_device', 't_face_device_user', 'userid,name,privilege,face_img,list_id', [['device_no', '=', $device['device_no']]], 5000);

你期待的结果是什么？实际看到的错误信息又是什么？

2019-09-24 16:25:29 1 .memory_get_usage:4324456,

2019-09-24 16:25:29 2 .memory_get_usage:5038776,

2019-09-24 16:25:29 getSynUserInfo 1 .memory_get_usage:5103880,

2019-09-24 16:25:29 getSynUserInfo 2 .memory_get_usage:5171048,

2019-09-24 16:25:29 getSynUserInfo unset begin .memory_get_usage:8699784,

2019-09-24 16:25:29 getSynUserInfo unset last .memory_get_usage:8692056,

2019-09-24 16:25:29 getSynUserInfo stuid .memory_get_usage:10867024,

2019-09-24 16:25:29 getSynUserInfo unset stuid .memory_get_usage:8425760,

2019-09-24 16:25:29 getSynUserInfo unset begin 2:8989280,

2019-09-24 16:25:29 getSynUserInfo unset last 2:8693936,

[2019-09-24 16:25:29 $24616.0] WARNING swManager_check_exit_status: worker#0[pid=24618] abnormal exit, status=0, signal=11
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