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 […]

20 Leading Companies Share How COVID-19 is Accelerating the Future of APM

One year ago, I asked 12 of the leading providers of application performance monitoring (APM) and other SaaS-based monitoring services: what will the future of APM look like in 2020?  They pointed to the rise of AIOps (Artificial Intelligence for IT Operations), Big Data, and Digital Experience Monitoring (DEM) as the core advancements in this space. […]

MySQL Performance: Stop hoarding. Drop unused MySQL databases

Recently, I supported a new client with solving MySQL performance issues. There were several areas where MySQL performance issues were addressed. One issue, however, was overlooked prior to our communications, was that of keeping around unused databases. There was around 15 gigabytes of unused MySQL data – a mix of MyISAM and Innodb tables – […]

Apache Performance: Disable .htaccess

A while back, I searched the web for a performance article which I could forward to a client of StackLinux. An article explaining how using WordPress Cache plugins which make use of .htaccess, are almost always slower than plugins that don’t use .htaccess. Surprisingly, that search took a lot longer than expected, until I finally came across this […]

How to Optimize Your Cloud Services Cost

In this blog post, we review some of the biggest risks behind increasing services cost and how to optimize cloud services cost with a proper application monitoring solution. As modern software deployments continue to break down into smaller and more modular units, the world is seeing more moving parts in the deployment equation. The drivers […]

MySQL Database Performance: Avoid this common mistake

One frequent topic of support request emails I receive is MySQL database performance. Clients complain about MySQL using too much server memory, too many MySQL slow queries, the famous Mysql server has gone away error and many other MySQL performance related issues. As such, I wanted to quickly share the solution to a common MySQL configuration […]