How to Fix Yoast SEO for WordPress DeleteDuplicateIndexables MySQL error

In recent days, there are a number of reports about broken Yoast SEO database operations, related to the DeleteDuplicateIndexables function. The PHP function is located in the file wordpress-seo\src\config\migrations\20200507054848_DeleteDuplicateIndexables.php, and in this post I’ll provide you with a possible fix for this statement. Read on. Jan ReilinkMy name is Jan. I am not a hacker,…

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Reduce Wordfence CPU usage, disable Wordfence “Live Traffic View”

Whenever WordPress is using a lot of CPU and you have Wordfence Security plugin enabled, it is recommended to double check some settings. Unfortunately the Wordfence “Live Traffic Options” (“Traffic logging mode”) feature can cause high CPU usage and load issues for WordPress websites. Therefore, I recommend you disable this feature to improve the performance…

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MySQL Connector/ODBC C# test script

Whenever you need to test your ASP.NET connection to your MySQL database, using ODBC, you can use the following C# test script. Currently it uses MySQL ODBC 8.0 Unicode Driver, but you can easily change the version used. As a bonus it prints some connection information and it requires an SSL connection to your MySQL…

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MySQL InnoDB performance improvement: InnoDB buffer pool instances – Updated!

Are you running into MySQL load problems? Learn how to tune MySQL servers for a heavy InnoDB workload, by configuring innodb_buffer_pool_instances. Dividing the InnoDB buffer pool into multiple instances improves Disk I/O. By doing so, you run your database and website more efficiently and faster. Here is a little help for you. Jan ReilinkMy name…

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Optimize WordPress MySQL tables through Cron, behind the scenes

Schedule WordPress database optimization with WP-Cron To regularly optimize my WordPress database tables, I created a small plugin that utilizes the WordPress Cron feature. This comes in handy to perform database optimization for WordPress on a regular basis, without forgetting about it. Just activate and enjoy. And here is the plugin code … Jan ReilinkMy…

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Vevida Optimizer WordPress plugin

Installing WordPress is one thing, keeping it up to date is something else. Each week brings new bugs or potential attack scenarios that will make a WordPress website vulnerable to hacks. Enabling automatic updates for all or at least most parts of WordPress solves a large number of problems with irregularly maintained WordPress websites. Jan…

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Convert PHP ext/mysql to MySQLi

This post will show you how to convert PHP mysql extension functions to PHP MySQLi extension. Migrating away from ext/mysql to MySQLi (or PHP Data Object (PDO)) is important, because the ext/mysql functions are deprecated as of PHP 5.5.0. If you do not update your PHP code, your website will fail soon! Jan ReilinkMy name…

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How to restore a deleted Open-Xchange context?

How-to restore, or recover, an accidentally deleted OX context. If you’ve accidentally deleted an Open-Xchange context (contextid), then that is bad… Here is how to recover a deleted OX context and filestore… Assuming you make Open-Xchange backups of course.

How to disable WordPress comments

The WordPress comment system can be a bless for your blog, because of the user interaction. However, when the WordPress comment option is abused by spammers, it becomes a real pain in the “@ss”. With thousands spam reactions, disabling -and removing- WordPress comments is the only way to go. Here is how to disable WordPress…

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How to string replace on all WordPress posts in MySQL

Learn how to replace content in your MySQL database in bulk with MySQL REPLACE. Sometimes it’s useful to know how to bulk edit content in your WordPress MySQL database, using MySQL’s REPLACE() function. Here is how to string replace content in WordPress wp_posts table to bulk edit WordPress posts through MySQL. Jan ReilinkMy name is…

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MySQL sleep() attacks

MySQL sleep() command injection attacks: how not validating your PHP user input can lead to Denial of Service (DoS) attacks against websites and back-end database servers. Simply by putting “AND sleep(3)” in the address bar… Happy SQL injection! Jan ReilinkMy name is Jan. I am not a hacker, coder, developer or guru. I am merely…

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