最近在学mongoDB,安装倒没什么困难,有yum仓库.不过接入ctl后的一条warning倒挺让人烦心的. 1 2 2015-03-22T09:27:00.222+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. 2015-03-22T09:27:00.222+0800 I CONTROL [initandlisten] ** W
0.写在前面 本文涉及到屏幕密度的讨论,这里先要搞清楚 DisplayMetrics 的两个变量,摘录官方文档的解释: density:The logical density of the display. This is a scaling factor for the Density Independent Pixel unit, where one DIP is one pixel on an approximately 160 dpi screen (for example a 240x
问题描述: 1.机器:Linux主机,特别是主机为大内存,比如: 4G内存的使用pae内核的Ubuntu系统的thinkpad电脑. 2.情况:使用VirtualBox安装Linux系统时,比如:通过Virtalbox安装 ChromeOS.安装YLMF OS等. 3.原因:需要安装的linux系统需要启动 pae支持. 4.错误:如下: This kernel requires the following features not present on the CPU: pae Unable