I run a localized version of WordPress, that partially comes from my Linux package manager, but that has been modified by me, to allow me to install the plug-ins and extensions from WordPress.org .
Therefore, whenever an update to the core files is available from Debian Team – from the package manager – I am a little apprehensive, that the way this update is carried out might not be compatible with my customizations.
Most of the time, updates are good, but on occasion, they may break things.
Today an update to the core package came through the package manager, which technically puts my version at ‘4.1+dfsg-1+deb8u12′. I am sure that there are benefits to users like me. But most importantly, it seems that this update did not break anything. Yay!
Also, I am not recording any down-time, because as far as I can tell, I was able to display a Maintenance Mode page, while the update took place, which would have told readers that the site is undergoing maintenance, for a few minutes.
P.S. I also had to restart my ‘memcached’ daemon after that, the purpose of which is to introduce caching on my side – on the server – to speed up retrieval of whatever readers are interested in most often. Because this cache has therefore been flushed, some of the pages and postings may load a little slowly for the next day or two.
(Edit 02/03/2017 : ) I have begun to notice some functional changes in the behavior of WordPress, that I believe stem from this update. In short, the new version seems to use my caching daemon more consistently, than the previous build did.