07. 01. 2024.

The disadvantages of microservices architecture

The microservices architecture, as a successor to the service-oriented architecture style, represents a widely accepted approach to developing complex applications. It is based on a collection of loosely-coupled independent services that communicate with each other using lightweight protocols. The main problem solved by this architectural pattern is the ability to develop and deploy new services […]

25. 11. 2023.

Myths and shortcomings of serverless computing

In this article, we’ll demystify one of the main sales tactics used by Cloud providers: serverless & autoscaling features. This article is a continuation of the previous one: “The main disadvantages of Cloud computing that you will notice when it’s already too late”. https://www.josip-pojatina.com/en/the-main-disadvantages-of-cloud-computing-that-you-will-notice-when-its-already-too-late/ where other (pre)sales tricks used by Cloud providers to acquire new […]

02. 11. 2023.

The main disadvantages of cloud computing that you will notice when it’s already too late

I started using cloud computing nearly 14 years ago, at the very beginning of cloud computing. After the initial enthusiasm, I quickly noticed the drawbacks of the Cloud, and it puzzled me why no one was writing about it. Although I have already wrote about the downsides of cloud computing in one of my previous […]

30. 01. 2023.

Real-time Deep Learning at Bug Future Show conference

On Thursday, February 2, 2023, the tenth Bug Future Show will be held, which for the first time will introduce a third parallel track called “.debug Future Show” intended primarily for IT people, where, among other things, you can find my lecture titled called “Real-time Deep Learning” starting at 11:15.   This is a short […]

19. 06. 2022.

How to speedup pooling queries from the Oracle database

This post is a kind of extension of my previous post named “How to index only rows of interest” which can be found on the following link: https://www.josip-pojatina.com/en/how-to-index-only-rows-of-interest/   Having issues with pooling queries are very common in old, SOA based architectural style, where ESB (Enterprise Service Bus) are throwing the same query again and […]

30. 05. 2022.

How to get 100% cache hit rate by using Change Data Capture & Redis

In this blog I’ll explain how to get 100% cache hit rate by using CDC (Change Data Capture) technology and Redis cache.   There are multiple benefits of having caching layer in front of back-end database system. By fetching data from the cache instead of back-end we are actually free up valuable database resources for […]

25. 02. 2022.

Redis performance tuning – Top 10 mistakes

Redis is the most popular Key-value data store and one of the most popular database systems overall.   According to Db-engine ranking: https://db-engines.com/en/ranking/key-value+store (You can check the picture below), Redis is on the top position by large margin among Key-values data stores. Amazon DynamoDb on the second place, lags behind Redis more than a twice. […]

29. 12. 2021.

Apache Ignite – distributed In-memory SQL database

Apache Ignite is one of the very few In-memory SQL compliant distributed databases/data grid among open-source projects. It’s often called “Redis done right” or “Redis on steroid”, because Redis looks primitive and limited when compared with Apache Ignite. Ignite offers great flexibility and lot of features that can easily fit to many use cases. Instead […]

04. 06. 2021.

Hybernate FetchType Eager performance issue

Quite recently I had one interesting case related to the quality of code generated by the Hybernate, in which I developed code which runs 25 thousand times faster than the code generated by the framework.   It’s well known when you decide to use any framework to speed up code development process, you silently agree […]

04. 05. 2021.

Tuning Connection pool in modern Microservice architecture

Connection pool has always been a great way to ensure a low latency when establishing connection with a database, while at the same time keeping the number of open sessions under control. It’s one of the best ways to balance speed with resource consumption. With connection pool in place, connection is already established and ready […]