索引对性能的影响
1、大大减少对服务器需要扫描的数据量
2、帮助服务器避免排序和临时表
3、将随机I/O变顺序I/O
4、大大提高查询速度,降低写的速度、占用磁盘
学习日志 LIUGUOFENG
1、大大减少对服务器需要扫描的数据量
2、帮助服务器避免排序和临时表
3、将随机I/O变顺序I/O
4、大大提高查询速度,降低写的速度、占用磁盘
cd /etc/sysconfig/network-scripts/
找到网卡 例如 ifcfg-eno33
vi ifcfg-eno33
将最后一行的 ONBOOT=no 改为 ONBOOT=yes 然后退出 vi
退出重启 network
service network restart
Windows 10 搜索卡死解决方法
apt 更换阿里源
备份系统自带源
sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak
修改 /etc/apt/sources.list文件
sudo vim /etc/apt/sources.list
加入下列内容
deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
开发了一个微博相册一键批量下载的 Chrome 浏览器插件,理论上 360、QQ等一众国产双核浏览器也可以使用
Continue reading Octoman 微博相册批量下载 Chrome 扩展检查是否对默认事件进行了阻止,如有则去掉,如下
$(document).on('click', 'img', e => {
e.preventDefault();
})
img {
pointer-events: none;
}
将图片样式设置为
style="pointer-events:auto;"