Denis.es Blog

In database management, ensuring the integrity of data during concurrent operations is a common challenge. While row-level locking in MySQL is often associated with UPDATEs, there are scenarios where even a SELECT operation requires locking to prevent data inconsistencies. This is especially important in high-concurrency environments like banking, inventory management, or billing systems. Read more

How much memory can I install in my QNAP TS-469? No, it's not limited to just 3 GB! What is DOM or Flash Memory? What's inside my QNAP NAS? How reliable does MemTest86 show all possible problems? How much memory and what kind of RAM can be installed on the Lenovo Yoga 500 and Lenovo B590? Answers in this article. Read more

Opinion on the GT RADIAL KargoMax compared to Chinese trailer tires. About a robust boat trailer spare wheel bracket. Read more

You will find answers to questions about problems with the service worker that you have been asking for a long time, but could not find answers anywhere on the Internet. Read more

In this customer-oriented post, you will learn the difference in the process of installing Progressive Web Apps (PWAs) on Android, iPhone, and Windows and how to give your customers good instructions. Read more

This is a personal note on how to efficiently automate icon creation with Inkscape, but you may find some helpful tips for yourself here. Read more

Let's see what favicons and app icons are essential in 2022. Is it possible to use only SVG? How about icons with transparent background? Read more

What is a PWA (Progressive Web App)? Let's try to explain it simply. You will learn the basic concept through an example of converting a web page to PWA and a simple explanation of the service worker and manifest. Read more

Have you wondered how the converted HTML5 video will look in browsers and whether compression or rescaling will affect the quality? Here you will find the answer. Read more

Have you ever wondered how various HTML5 video options (video tag options) will affect how the video is rendered in browsers? Here you will find the answer. You will also finally know if there is a correct answer to the question of which video format gives the best results in terms of size and performance. Read more

Your Facebook cover photo is the large image at the top of your Facebook Page. This is the first thing your visitors see and depending on what they see, they will either decide to look further or not. A good Facebook Page cover photo should work well on both desktop and smartphones. Check how effective your cover photo is. Read more

My customers often ask me: “What would happen if I used device in very cold conditions?”. Let me explain why some devices can be used in a cold environment and some cannot. Read more

I am delighted to inform you that iSocket Systems has been declared the Q3 Winner of the Thread Group’s competition for our Cellular Connected Home with Thread technology. Read more