In-depth technical articles, high-load system architecture analyses, and practical digital transformation strategies shared directly by Sudo’s engineers and solutions architects.
A small database server is shared by several websites, one of them a sales management application. At the start of the workday, staff open the orders page and it spins forever, while the database serv...
The table already had an index on the right columns, yet a "related posts" SQL query still hung for tens of seconds, the processlist filled with stacked-up queries, and the database server's load jump...
Open the access log on any balancer and you will see the same kinds of requests over and over: /.env, /.git/config, /wp-login.php, /phpmyadmin/, /vendor/phpunit/.... A Laravel site has no WordPress or...
A common situation on a small Cloud VPS database server: the dashboard shows RAM sitting at an alarming level day after day. The machine has not crashed and the websites still work, but with 1 GB of R...
Polars is a DataFrame library written in Rust with a Python API, built around one idea: you describe the whole query first, the library optimizes the plan, and only then does it read any data. On an o...
Open the test suite of an order system after two years of development and you usually see the same scene: every test is thirty lines long, the first twenty only build a Customer, an Address and some O...
TTFB (time to first byte) is the time from sending a request until the first byte of the response arrives. For users, a high TTFB means a page that loads several times slower. For Googlebot, a persist...
Some incidents leave operators puzzled: the balancer returns 502/504 in waves, traffic is close to zero, and yet the PHP-FPM pool is always full of busy workers. That is a PHP-FPM hang caused by waiti...
Responsible AI is not an ethics slogan on the last slide of a deck. It is a concrete set of engineering tasks: knowing which personal data you use, whether you have the right to use it, whether the mo...
In a multi-tier Cloud VPS setup, the balancer is often the smallest machine but carries the largest responsibility: every website passes through it. When RAM runs out, the kernel triggers the OOM kill...
A common situation with Laravel: several queue workers run jobs that rebuild a statistics table, each job handles a different group of data, and once in a while a job fails with error 1213. That is a...
Some designs look reasonable when you first write them. The whole team may even praise them as "clean". A year later they are the source of every slow bug fix. The term anti-patterns describes exactly...
All articles are displayed
