[{"createTime":1735734952000,"id":1,"img":"hwy_ms_500_252.jpeg","link":"https://activity.huaweicloud.com/cps.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=V1g3MDY4NTY=&utm_medium=cps&utm_campaign=201905","name":"华为云秒杀","status":9,"txt":"华为云38元秒杀","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"new_ads.png","link":"https://www.iodraw.com/ads","name":"发布广告","status":9,"txt":"发布广告","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
电脑运行卡不卡,取决于三大因素:CPU、内存、磁盘I/O。三者缺一不可,有一个短板就会卡。(我一般不处理图形,用不到显卡GPU。这里没提)
人们往往会认为,电脑卡顿,是因为CPU不行、内存太小或者内存已满。但实际上,磁盘的I/O速度,磁盘占用率,往往才是决定电脑卡不卡的重要因素。
现在的电脑大多使用虚拟存储器,拿8G、16G内存(RAM)便可以运行几十G的大型应用程序,用的技术便是虚存,即只把程序当前需要的这一小部分调入内存运行,等需要其他代码时再临时调入。磁盘I/O的速度便决定了这个调入的过程卡不卡。
磁盘(硬盘)分为固态硬盘SSD和机械硬盘
。固态硬盘随机存取,没有磁头臂,没有寻道时间,速度快;机械硬盘有磁头臂,需要移动磁头臂寻找磁道和扇区,速度慢。固态硬盘的I/O速度远高于机械硬盘,但价格也昂贵。
举个实际例子。
1.我的笔记本:8G内存 + 固态硬盘。流畅。
①CPU为 i5-9代。CPU主频低,2.4GHz。
②内存小,8GB RAM,经常内存拉的很高。360加速球显示的百分比数值是内存占用率。
③固态硬盘
2.我的工位机:16G内存 + 机械硬盘。经常卡顿。
①CPU为 i7-7代。CPU主频高,3.6GHz。
②内存大,内存占用率不高。
③但是机械硬盘,经常磁盘I/O拉到100%,导致卡死]
在加了一个1TB的移动固态硬盘
(价位¥1200)后,速度飞起。以前只能开一个虚拟机,开启动二个虚拟机就要5分钟。现在同时开三个虚拟机都不卡。所有的虚拟机保存在移动固态硬盘里,相当于随身带着多台电脑!但是丢了硬盘的话,也相当于同时丢失了多台电脑的资料。