Author: murat

..contributing to IT in London since 2002..

Fragile Virtualization

I was helping an old client tonight. We suddenly lost connection to the server (a Virtual Machine for a Windows Server). When we were able to connect again, we realized some differences: a folder was missing; then, we noticed a test database was missing; we also understood that the system was one week old! How …

Conscious Discrimination

Psychologists claim that discrimination is wired in our brains, starting at early stages of our lives. Please read: “Even babies discriminate: a nurtureshock excerpt” Since our brains are making many unconscious decisions most of the time, we have to try hard consciously and avoid behaviour that can be seen as discrimination and may upset people around …

Opensource: be grateful for enterprisey quirky mess

Apparently, it has taken almost a year for the most popular PHP mailing library to support TLS v1.1 and v1.2 !? https://github.com/swiftmailer/swiftmailer/issues/933 (Packagist says it is downloaded almost 73 million times! https://packagist.org/packages/swiftmailer/swiftmailer) … only after PHP geeks freaked out, started screaming, running like headless chickens (online), including me, maybe because some paranoid security guys turned …

Poor man’s full text search for SuiteCRM

The poor man’s CRM, a.k.a SuiteCRM, is great (… was great for its time!); that’s another story. One of the features provided is “unified search”, as the geeks call it; some may call it global/universal search across many tables and records in the database. What it does is simply as follows: Loop over a list …

MySQL Error: Thread stack overrun

Recently, I’ve come across this error: MySQL error 1436: Thread stack overrun: 164720 bytes used of a 196608 byte stack, and 32000 bytes needed. Use ‘mysqld –thread_stack=#’ to specify a bigger stack. I am using PHP 7.0 and MySQL 5.7 on a Ubuntu 16.04 VM. Basically, I was dynamically creating more than 5 long SQL …

Drupal 8 – Amazing progress!?

Drupal 8 (cash-cow of digital agencies)… after so many years, they cannot event get the basics right: no dedicated public HTTP folder, entire codebase is exposed relies on (Apache) .htaccess, serious issue for security and performancewhat about Nginx? writable code folders for sites, modules, themes, etc. – not dev-friendly at all what’s the place of …

The cost of a million objects – revisited for PHP7

PHP 7 is out there finally and I am sure the adoption rate will be very slow especially because of legacy code. Here is a repetition of my simple tests I’ve done before (PHP Memory Usage: The cost of a million objects) and comparison of those results between PHP 5.6.18 and PHP 7.0.3. path-to-php5/php.exe test-path/memory_test_v4_objects_with_myclass_simple.php …

Full-text search using PostgreSQL: simple, fast, cached

Let’s find out what can we achieve; using what we already have, without adding other layers, servers or applications: PostgreSQL. It will help us keep the architecture simple, please be patient 🙂 We need to prepare records for full-text search using 1-to-1 relationship for relevant records in other tables with search term vector from one …

PHP: The cost of a million objects on function calls

Especially, if you are a start-up, all it takes is a fine combination of: a bad coder (with an arrogant attitude of “code first + optimize later”) and 1000 simultaneous requests to bring each of your servers to its “knees”. On part 1, I’ve mentioned the cost of a million items when we are using …

PHP Memory Usage: The cost of a million objects

Even though memory is getting cheaper, our applications are becoming more complicated and we need to write our code more carefully. I’d like to share some surprising tests I’ve written recently. The sample code files are also on github: https://github.com/muratyaman/php-tips. The tests are very simple: let’s create an array of million items to process: version …