Linux Performance: Almost Always Add Swap. Part 2: ZRAM

Previously, we looked at how swap space, particularly swapping, can severely slow down Linux performance. We then tweaked Linux kernel parameters to better use server memory and avoid heavy swapping. That article created some debate and good arguments for and against swap space. For example, if you have more than enough memory available, wouldn’t it […]

Nginx tuning tips: TLS/SSL HTTPS – Improved TTFB/latency

Since 30th June 2018, the PCI Security Standards Council has required that support for SSL 3.0 and TLS 1.0 be disabled and, more recently, to disable TLS 1.1. Using TLS 1.2 and 1.3 is strongly recommended. In addition, as of July 2018, Google Chrome began to mark ‘HTTP’ websites as “not secure.” Over the past […]

Strip Down Apache to Improve Performance & Memory Efficiency

Can you believe that it’s been more than a decade since the release of Apache 2.4?! If you haven’t replaced Apache with Nginx, then here’s a quick guide for boosting Apache’s performance using a method that’s often overlooked. Now, before we get into that, please note that I’m not claiming that Apache is faster than […]

Free vs. Available Memory in Linux

At times we will need to know precisely how our Linux systems use memory. This article will examine how to use the free command-line utility to view memory usage on a Linux system. In doing so, we will clearly define the difference between free vs. available memory on Linux systems.   Free vs. Available memory […]

iotop command in Linux w/ examples.

This iotop command guide follows my previous 90 Linux Commands frequently used by Linux Sysadmins article. As time allows, I will continue to publish articles on the 90+ commands geared toward Linux sysadmins and Linux power users. Let’s continue this series with the iotop command. iotop is a simple top-like I/O monitor. A terminal program […]

90 Linux Commands frequently used by Linux Sysadmins

There are well over 100 Unix commands shared by the Linux kernel and other Unix-like operating systems. If you are interested in the commands frequently used by Linux sysadmins and power users, you’ve come to the place. Recently, I published a five-part series covering commands often used by Linux sysadmins. Below I’ve listed the 90 […]

Choosing the Best Linux Server Distro (2022)

Are you in the process of choosing a Linux server distro (distribution) for your next project? This article will help you decide by pointing out the strengths of the top Linux server distributions in contention. If you are looking for a Linux desktop distro, look at this post instead: Choosing the Best Linux Distro for […]

Free Linux Server Monitoring and APM solutions for SysAdmins

Today’s software applications require developers, testers, and SysAdmins to work together (DevSecOps) more seamlessly than ever before. A single line of code or poorly configured service can negatively impact your application’s performance, causing crippling slowdowns for end-users. This is where infrastructure and application monitoring comes in. Regarding Linux server monitoring, monitoring critical performance metrics of […]