How to upgrade to PHP 7 on RHEL/CentOS

TL;DR = Upgrade to PHP 7 using Remi’s RPM repository – PHP Configuration wizard. Red Hat Enterprise Linux (RHEL) is a Linux distribution developed by Red Hat targeted toward the commercial market. Red Hat uses strict trademark rules to restrict free re-distribution of its officially supported versions, but still freely provides its source code. Third-party derivatives […]

PHP 5.6 EOL (End of Life) – PHP 7 Compatibility Check

Summary: PHP 7.3 promises to be up to 25% faster than PHP 7.0 – Check your PHP scripts/apps for PHP 7 compatibility – Upgrade to PHP 7 ASAP – Confirm OpCache is enabled/monitored – some php.ini optimization tweaks. PHP 5.6 was first released back in 2014, with alpha 1 released in January 2014. Due to major performance improvements (phpng then […]

htop and top Alternatives: Glances, nmon

Previously we took a look at top, atop and indirectly (due to it’s 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 […]

atop for Linux server performance analysis, here’s how

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

Logagent: The Swiss Army Knife for Log Processing?

Guest post by Stefan Thies DevOps Evangelist at Sematext Group Inc. Dealing with log files or extracting data from various data sources is a daily task in the IT administration. Users ask about statistics or details of their technical or business operations. The relevant data is often present in log files, databases or message queues. Converting […]

Analyze Your Website’s TTFB (Time to First Byte)

I’ve been using online services to analyze TTFB (time to first byte) or TTFB check using curl command line. High TTFB will often cause your page loads to be mysteriously slow or at the very least increase the latency between page loads. You should check to see if your TTFB is a performance issue or not. Try […]

Increase Performance and lifespan of SSDs & SD Cards

SSDs (solid-state drives) and SD (Secure Digital) cards have a limited number of writes before they wear out. To get the most out of this storage type lets investigate, then make a few adjustments to maximize the life of your SSDs and SD cards. Article refreshed from 3 years ago.   Using iotop to monitor and minimize […]

Avoid This When Tuning MySQL Query Cache for Performance

One of the most misconfigured MySQL performance features, is MySQL Query Cache Size. This post references a web server with 32 gigabytes of RAM where the existing config had MySQL’s query cache size set incorrectly to 4 gigabytes. The thought behind it seemed to be that more is better. Since the server has free RAM available, setting MySQL Query Cache […]

Linux roundup, for Linux Users and Sysadmins | Week 06

December 18th – January 15th roundup from around the web of all things Linux. Linux security, Linux tools, Linux articles, Linux guides and Linux news. – Subscribe. 01 | The mysterious case of the Linux Page Table Isolation patches – pythonsweetness.tumblr.com 02 | Amazon Kinesis: the best event queue you’re not using – instrumentalapp.com (sponsored) 03 | Linux page […]

Linux roundup, for Linux Users and Sysadmins | Week 05

December 10th – 17th roundup from around the web of all things Linux. Linux security, Linux tools, Linux articles, Linux guides and Linux news. – Subscribe. 01 | Fish: A user-friendly command line shell for macOS, Linux, etc – fishshell.com 02 | 8 emerging trends in container orchestration – datadoghq.com (sponsored) 03 | Introducing Amazon Linux 2 – aws.amazon.com 04 | Is […]