一、环境准备 1、官方建议在Linux机器上禁用THP(大页内存机制),以确保最佳性能 在/etc/rc.local最后添加如下代码 if test -f /sys/kernel/mm/transparent_hugepage/enabled; then?echo never > /sys/kernel/mm/transparent_hugepage/enabled?fi?if...
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject; public class Test { public static void main(String[] args) { // 字符串数组 String data = "[{\"name\":\"字段名\",\"...
我们先来看一段代码 create table if not exists test ( event_time DATETIME NOT NULL COMMENT "datetime of event", event_type INT NOT NULL COMMENT "type of event", user_id INT COMMENT "id of user", device_code INT COMMENT "device...