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Posts Tagged ‘MySQL’

  • August 16, 2025
  • 0 comments

Fixing slow WooCommerce logins: 15 million order notes and two comments

In the same project I blogged about last week, I was tasked to optimize the performance of the website. One of the major issues was the login performance. Any time I would log in, I had to wait around one … Read more →

  • Posted in: WordPress
  • April 30, 2023
  • 0 comments

Missing sidebar widget after migration – what happened?

I’m writing this blog post on my new server. The old one will be shut down in about two hours. As it had quite a few WordPress sites and one Matomo instance hosted, migrating everything was quite a task. Migrating … Read more →

  • Posted in: WordPress
  • October 24, 2021
  • 0 comments

Fixing the “Illegal mix of collations” WordPress database error

When updating projects I also check the log files. In a project I maintained, I recently found the following error in the log files I have never seen before: As WordPress is not very strict with collations, your own WordPress … Read more →

  • Posted in: Database

Portrait Bernhard Kau

 

My name is Bernhard Kau. I am a PHP developer, living in Berlin and a passionate WordPress user. I code plugins as a hobby and organize WordPress events, like the Meetup in Berlin.

Recent Posts

  • Fixing slow WooCommerce logins: 15 million order notes and two comments
  • Show only WooCommerce products in the default WordPress search
  • Allow editors to edit the privacy policy page
  • How to permanently delete a contact in Mailchimp
  • Why the trash is not a safe place to move content to

Recent Comments

  • Ulf on Repair a broken Git Repository file system
  • Remy Reinart on Show only WooCommerce products in the default WordPress search
  • Bernhard on Using Block Patterns for new entries of a Custom Post Type
  • Create Stunning WordPress Themes: Tips from Anders NorĂ©n on Implementing a custom block style variation using only JSON files
  • Bernhard on Why the trash is not a safe place to move content to
I'm a CD Table Lead - WordCamp Europe Basel 2025

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