Home Lab Beginners guide – Hardware

Until recently, and for well over the past decade, my wife and I have been nomads. Moving from the Caribbean to Miami, New York, Las Vegas, Vancouver, and now back home. This has meant that for many of those years, my home office basically comprised of a few laptops and screens. These days, we are more […]

atop – For Linux server performance analysis

We’re all familiar with top, a real-time system monitor. Some prefer htop and previously I mentioned iotop for use with storage read/write monitoring. Lets looks at another popular tool for Linux server performance analysis: atop.   Advantages of atop Atop is an ASCII full-screen performance monitor which can log and report the activity of all server processes. One feature […]

htop: Quick Guide & Customization

htop is an interactive system-monitor, but also a process-viewer, process-manager, strace tool and more. Sysadmins may opt to use htop in cases where Unix top does not provide enough information about system processes. htop uses a cursor-controlled interface for sending signals to processes. One example where this comes in handy is: you don’t have to type […]

Strip Down Apache to Improve Performance & Memory Efficiency

Can you believe that its been five eight years since the release of Apache 2.4?! Still, most Apache based web servers continue to run Apache version 2.2 or even 2.0. This is understandable for the same reasons why Apache web servers are still used more than Nginx… compatibility, official support and features. If you haven’t replaced Apache […]

How to direct-install Debian SID rolling release using mini.iso (w/ screenshots)

This post has been updated. Original post: May 20th, 2017. Last updated Feb, 28th 2020. For desktop, I’ve often preferred rolling release distros such as Arch Linux or custom installed Kali Linux. However, currently I’m on Ubuntu 14.04 LTS Fedora 31. Ubuntu recently released 16.04 LTS 18.04 LTS which meant performing an in-place upgrade or complete re-install […]

Panopta (exclusive offer) Get Two Free Months

Over the years Panopta has listened to customer feedback; they continue to respond with additional development and improvements to their infrastructure, application and network performance monitoring tools. With Panopta you can easily keep an eye on the most fundamental metrics across complex infrastructure so you can identify the root cause of problems. If you suffer […]

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 make better use of server memory and to 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 […]

50 Top Server & Application Performance Monitoring (APM) Solutions

Back in 2014, I compiled a list of top server and application performance monitoring solutions. Sharing that list publicly was a great way to gain feedback and recommendations on other tools available. In time that list grew from 20 to over 100 server monitoring and APM solutions! Because of it’s growing size, I’ve created below, a smaller, more […]

Could not increase number of max_open_files to more than… (Solution)

A quick solution to the warning “Could not increase number of max_open_files to more than” when starting MySQL or MariaDB. For some background read How MySQL Opens and Closes Tables. Here’s an excerpt: “The table_open_cache and max_connections system variables affect the maximum number of files the server keeps open. If you increase one or both of these […]