it really depends on your personal preferences and your application requirements. Generally, an amount equal to or double the amount of RAM on your system is a good starting point. Another good rule of thumb is that anything over 4G of swap is probably unnecessary if you are just using it ...
A swap file is a type ofswap memoryin the form of a computerfileon anHDDorSSDthat serves as an extension to physical memory (RAM). A computer uses a swap file to store data from RAM that is temporarily inactive. The swapping process frees up RAM space by moving infrequently used data ...
One of the easiest ways to make your server more responsive, and guard against out-of-memory errors in your application, is to add some swap space. Swap is an area on a storage drive where the operating system can temporarily store data that it can no longer hold in memory. This gives...
Not only can a programmer use regular file operations to work with a device, but some devices are also accessible to standard programs like cat, so you don’t have to be a programmer to use a device. However, there is a limit to what you can do with a file interface, so not all d...
You now know the physical and logical structure of a Linux system, what the kernel is, and how to work with processes. This chapter will teach you how the kernel starts— or boots. In other words, you’ll learn how the kernel moves into memory up to the point where the first user pr...
Swap isn't just used as a means to free up RAM when you're running low on memory. It's an important part of a well functioning system. Without any swap, sane memory management becomes very difficult for the kernel to achieve. Let's look at the easy way to add some swap space. ...
Many GRUB commands are similar to Unix shell commands; there’s even an ls command to list files. 这种困惑是正常的,因为GRUB并不真正使用Linux内核,而是启动它。你看到的配置完全由GRUB内部命令组成。GRUB实际上是一个完全独立的世界。困惑的原因在于GRUB借用了许多来源的术语。GRUB有自己的“内核”和自己...
In this chapter, we’ll discuss in detail how to work with disks on a Linux system. You’ll learn how to partition disks, create and maintain the filesystems that go inside disk partitions, and work with swap space. 在第三章中,我们讨论了内核提供的一些顶层磁盘设备。 在本章中,我们将...
3. Enable Swap Now that we have an available swap file, we need to use it and turn into actual swap space. The first step will be to lock the permissions of swap_file so that it can only be read by users with root privileges. We can do this by typing: ...
What is Swap? Swapis an area on a hard drive that has been designated as a place where the operating system can temporarily store data that it can no longer hold in RAM. Basically, this gives you the ability to increase the amount of information that your server can keep in its working...