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What Is A Kernel?
The kernel is a piece of software that is at the core of an operating system. It usually has complete control over all of the server systems. It is normally the first program loaded after the bootloader has completed its tasks. The kernel then handles the rest of the start-up tasks as well as i/o requests from the system’s software. It then translates those requests into hardware instructions for the CPU (central processing unit).
Continue reading “How to Simplify Working With Kernels”
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What Does Server Load Mean?
Checking a server’s load allows us to evaluate server resources and confirm they are sufficient for any running application. It enables us to troubleshoot slow performance and reliably pinpoint any server resource that may need attention.
While there are many tools and options available, today let’s focus on Windows Task Manager as a way to help us quickly see what is going on, and interact with applications, processes, and services to identify the load. This article will also include an introduction to Resource Monitor as it can be opened from Task Manager to provide more detail.
Continue reading “How to Check Server Load on a Windows Server”
Reading Time: 11 minutesThe command line terminal, or shell on your Linux server, is a potent tool for deciphering activity on the server, performing operations, or making system changes. But with several thousand executable binaries installed by default, what tools are useful, and how should you use them safely? Continue reading “Useful Command Line for Linux Admins”
Reading Time: 3 minutesBefore we get into the nitty-gritty of Apache tuning, we need to understand what happens when servers go unresponsive due to a poorly optimized configuration. An over-tuned server is one that is configured to allow Continue reading “Apache Performance Tuning: Swap Memory”
Reading Time: 2 minutesOften we hear a lot of customers asking why, when their server is largely idle, much of their RAM appears to be in use.
When RAM is not needed for other functions, your server will load frequently-accessed files into memory in order to read them more quickly. When a file is loaded into RAM, the server can access the information orders of magnitude faster than from disk. A modern SSD disk can read files at up to around 500-700 MB/second, if the files are in sequential units. However, RAM can be read at GB/second rates; or even tens of GB/second.
If the RAM becomes needed for another function, these files are quickly flushed out of memory, and the RAM becomes available for other tasks. Continue reading “Why Is Most of My Memory Being Used?”
Reading Time: 3 minutesNow that you know how to SSH into your server it is important to familiarize yourself with some basic command line tools.
Continue reading “New User Tutorial: Basic Shell Commands”