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Displaying posts with tag: Wordpress (reset)
Replace MariaDB 10.3 by MySQL 8.0

Why migrating to MySQL 8.0 ?

MySQL 8.0 brings a lot of new features. These features make MySQL database much more secure (like new authentication, secure password policies and management, …) and fault tolerant (new data dictionary), more powerful (new redo log design, less contention, extreme scale out of InnoDB, …), better operation management (SQL Roles, instant add columns), many (but really many!) replication enhancements and native group replication… and finally many cool stuff like the new Document Store, the new MySQL Shell and MySQL InnoDB Cluster that you should already know if you follow this blog (see these TOP 10 for features for developers and this TOP 10 for DBAs & OPS).

Not anymore a drop in replacement !

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Migrate from MariaDB to MySQL on CentOS

On this article, I will show you how to migrate your wordpress database from the MariaDB on CentOS to the real MySQL.

Why migrating to MySQL 8.0 ?

MySQL 8.0 brings a lot of new features. These features make MySQL database much more secure (like new authentication, secure password policies and management, …) and fault tolerant (new data dictionary), more powerful (new redo log design, less contention, extreme scale out of InnoDB, …), better operation management (SQL Roles, instant add columns), many (but really many!) replication enhancements and native group replication… and finally many cool stuff like the new Document Store, the new MySQL Shell and MySQL InnoDB Cluster that you should already know if you follow this …

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Installing WordPress 5 on ZEIT Now with MySQL Hosting

Want to deploy WordPress 5.0 on the Now platform by ZEIT? Our friends over at ZEIT’s Now global serverless deployment platform whipped up a great tutorial for WordPress5-on-Now using cheap MySQL hosting instances from ScaleGrid. With such strong interest in this installation, we decided to write up the steps to configure your MySQL database on the ScaleGrid side to get you up and running ever faster with WordPress on Now.

Leave your comments: https://t.co/exuBzSHkHM
@now/wordpress summary:
◆ λ size = 13mb
◆ Just needs `wp-config.php`
◆ All static assets output directly to CDN …

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Extending WordPress Dockerfile to use MySQL 5.7 (or 8.0)

Oracle’s website shows End of life for MySQL 5.5 as of Jan 20th of 2019, so hurry up and upgrade!

I am working building some demos for Cloud SQL and one of the requirements I had was to run MySQL 5.7 and WordPress as my sample application. The demo consisted on migrating from a single VM environment with WordPress and MySQL running alongside. The narrative: the site got popular and the database became the bottle neck because of all the shared resources between them and the application. The proposed solution? A minimal downtime migration to Cloud SQL, moving the data layer to a dedicated server.

I am going to be doing this demo a lot of times, so I needed some way to automate it. I thought of doing through Docker. I am not Docker proficient, and to begin with I asked …

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Debug a slow Wordpress site

A few days ago my colleague asked me to help him figure out why his Wordpress website was running so slow. Everything seemed fine, the CPU was not busy, the memory was not used much. It was not the network issue because its ping time was very fast. The MySQL database was not slow either. So it was hard for me to debug.

The site returned 504 error initially, but it sometimes could load the page (after a long wait). I checked the Nginx error log and found that the upstream connection was not responded. So it must be something wrong with the PHP code.

I tried many ways which I found on the internet but no success. Most of them were about increasing the timeout or the execution time. By doing that, the page could load but it was still super slow (it loaded in > 1min).

When I sat quietly for a while to think, I realized that plugins could be the issue. There could not be any reason a Wordpress could be that slow unless …

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How to Reset WordPress Admin Password via MySQL Command Prompt

Have you ever forgotten your WordPress administrator password and did not have access to your e-mail account or haven’t configured your e-mail account properly in WordPress? Fear not, because in today’s tutorial we are going to learn how to reset the WordPress administrator password through the MySQL command prompt. Resetting WordPress Admin Password via MySQL Command […]

TEXT and VARCHAR inefficiencies in your db schema

The TEXT and VARCHAR definitions in many db schemas are based on old information – that is, they appear to be presuming restrictions and behaviour from MySQL versions long ago. This has consequences for performance. To us, use of for instance VARCHAR(255) is a key indicator for this. Yep, an anti-pattern.

VARCHAR

In MySQL 4.0, VARCHAR used to be restricted to 255 max. In MySQL 4.1 character sets such as UTF8 were introduced and MySQL 5.1 supports VARCHARs up to 64K-1 in byte length. Thus, any occurrence of VARCHAR(255) indicates some old style logic that needs to be reviewed.

Why not just set the maximum length possible? Well…

A VARCHAR is subject to the character set it’s in, for UTF8 this means either 3 or 4 (utf8mb4) bytes per character can be used. So if one specifies VARCHAR(50) CHARSET utf8mb4, …

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Contributing to popular frameworks for scalability

Right now we’re volunteering some engineering time to assisting the WordPress and WooCommerce people with scalability issues. In the past we’ve put similar efforts into Drupal.

There are many opinions on these systems out there, most of them sadly negative. We take a different view. Each of these frameworks obviously has their advantages and disadvantages, but the key question is why people use them. When we understand that, we can assess that reasoning, and assist further.

Obviously writing your own code all the way is going to potentially create the most optimal result for your site. A custom tool is going to be less code and more optimal for your situation. However, it also requires you to put in quite a bit of development effort both to create and to maintain that system, including security issues. When you’re big enough (as a site/company) this can be worthwhile, but more and more organisations …

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MySQL Group Replication, the perfect HA database backend for web hosting

Many web hosting provider are looking for HA solution for the database backend they deliver to their customers.

Galera never became the perfect choice for these environment due to 2 factors:

  1. no DBA really manage the databases
  2. Galera runs database changes in Total Order Isolation

What does that really mean ? In fact, when you are a website hosting provider, you host the website (apache, nginx) on vhosts and you share a database server in which every customer has access to their own schema for their website.

Most of the time, those websites are CMS like Drupal, WordPress or Joomla (and certainly many others sharing the same …

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Curing a Critical Security Bug

A WordCamp US this year, I spoke about the Trojan Emoji security bug, which we fixed in WordPress 4.1.2.

In particular, I went through how we came to wrap our head around the bug, and then write a solution that worked for every WordPress site.

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