25 Best CDN Providers 2021

A content delivery network also referred to as a content distribution network (CDN), is a geographically distributed network of data centers containing proxy servers. CDN providers serve internet content, including web objects (text, graphics, and scripts), downloadable objects (media files, software, documents), applications (e-commerce, portals), live streaming media, to name closer to and thus faster, to end-users. Some of […]

Observability, Getting Started – 50 Free Access and Open-Source Solutions

This article discusses APM and observability while highlighting free observability solutions and tools. I’ve also included several quotes collected from observability companies who offer free-level access to their platforms and composed a list of 40 noteworthy paid and open-source observability solutions. Lastly, I hope to urge observability providers to extend free and open access to […]

Linux top: Here’s how to customize it

The top command – referred to below as Linux top – is a command on Unix and Unix-like systems such as Linux, which provides a dynamic real-time overview of a running system. It can display system summary information and a list of processes or threads currently being managed by the Linux kernel. The types of […]

Is Cloudflare Argo worth it?

Cloudflare Argo reduces network latency on average by 35% and connection errors by 27%. Traditional network technologies use static routing information, which can be slower and often use congested paths. Slow loading times and connection timeouts increase the likelihood of poor user experience. The Cloudflare company routes 10% of all HTTP/HTTPS Internet traffic. This provides […]

PHP memory_limit – understanding and increasing this setting

PHP memory_limit is per-script, just as a highway’s speed limit is per-vehicle. For example, although PHP’s memory limit may be set high to 1GB, that does not mean that scripts will pile up to use that 1GB. Let’s take a quick look at understanding PHP’s memory_limit setting.   PHP memory_limit is a per-script setting PHP.net’s […]

htop and top Alternatives: Glances, nmon

Previously we took a look at top, atop, and indirectly (due to its popularity as top’s alternative) htop (the last screenshot on this page). But are there other alternatives worth looking at? As it pertains to system health and performance, this is largely a matter of preference regarding what data is most important to you. We […]

Linux Performance: Why You Should Almost Always Add Swap Space

We know that using Linux swap space instead of RAM (memory) can severely slow down performance. So, one might ask, since I have more than enough memory available, wouldn’t it better to delete swap space? The short answer is, No. There are performance benefits when swap space is enabled, even when you have more than […]

100+ Application Monitoring tools and Server Monitoring Solutions

Looking for application monitoring tools and server monitoring solutions? On this page, I’ve listed the top application performance monitoring (APM), server monitoring, and observability solutions to date. The listings are updated frequently as APM and observability solutions continue a rapid evolution. While I haven’t tested all of these solutions, I’ve used more than a third […]

What is iowait and how does it affect Linux performance?

I/O wait or iowait, wait, wa, %iowait, or wait% is often displayed by command-line Linux system monitoring tools such as top, sar, atop, and others. On its own, it’s one of many performance stats that provide us with an insight into Linux system performance. I/O wait came up in a recent discussion with a new client of […]

MySQL Performance Tuning: Tips, Scripts and Tools

With MySQL, common configuration mistakes can cause serious performance problems. In fact, if you misconfigure just one of the many config parameters, it can cripple performance. Of course, the performance of MySQL is often tied to the efficiency of your MySQL queries. It’s important to ensure that your performance issues are not due to poorly […]