How to speed up WordPress blog: REDIS

Remember my recent post on mysterious improvement?

(Yep, if you don’t read Polish you’re out of luck. Sorry. Should have warned ya.)

I usually don’t do technical WordPress advisory stuff here on my blog but this entry is an exception. Today we’ll see how to make our blog run rather than just walk. From a slightly different angle this time.

Let’s start from the most important question: is our blog too slow?


I’ve been actively using this language for over 10 years now and still cannot refrain from laughing on the word „supersedes”

In my home tongue it means „a supertoilet”: „super” is a universal prefix that works more or less the same in most languages and „sedes” is simply a toilet (or, to be absolutely precise, it goes semantically somewhere between „toilet bowl” and „toilet seat”).

Economical mumbo-jumbo

Whilst browsing the Internet I recently ran into an interesting (and probably totally unreallistic) idea: universities should be free from charge for all students. Their (i.e. universities’) income should be funded exclusively off a 10% tax charged unconditionally from all alumni for the first ten years after they graduate. This would – in theory – lead to situation where „better” schools would be feeding job market with „better” professionals which in turn would make them (again, just hypothetically) more money.

0, 1, 8, 144 (EN)

While surfing the Internet I recently found an interesting (although completely incomprehensible) proof of a conjecture stating that 0, 1, 8 and 144 are the only perfect squares in the famous Fibonacci sequence.

For greenhorns: Fibonacci sequence starts with 0 followed by 1, then each subsequent terms is a sum of two preceding terms: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, … and so on, indefinitely.

How to create an empty file in Windows cmd shell

I faced an interesting[citation needed] task recently. For each file sent over via the ftp channel I was supposed to generate an empty *.OK file and send it over immediately after the main file transfer was completed.

This allows the receiving party to process the file on their side with minimum delays.

Let’s say we are sending 5GB of csv data in the CUSTOMER_2016.csv file. As soon as the transfer is done, we need to send an empty CUSTOMER_2016.csv.OK file.

Xenial Xerxus and WordPress – upgrading your VPS

It is very important to keep your software updated. Forget to upgrade your apache to the latest version and you’re screwed. Forget to install recent security patches and you’re pwned. And so on.

So, when I logged on to my VPS this morning and saw a big message saying that „…blahblahblah new version of Ubuntu is now available, please upgrade blahblahblah…”, I decided to give it a shot.


I have recently faced a very annoying issue with one of the ETL processes. Very annoying issues are often easily resolvable in simple ways[citation needed] and thankfully this was one of them. However, before I managed to solve it, I wasted a whole bunch of otherwise perfectly usable minutes which is something I always loathe.

By writing this entry I am hoping to save you from wasting those precious minutes yourself.