MySQL Document Store is a JSON document storage solution built on MySQL. One of the advantages of using MySQL Document Store for JSON document storage is when we need to run complex queries for analytics or reporting we can use raw SQL to retrieve data from our JSON documents. But what if we want to view […]

OpenLiteSpeed is a lightweight and open-source version of the LiteSpeed Server developed by LiteSpeed Technologies. It supports Apache Rewrite rules, HTTP/2 and HTTP/3, TLS v1.3, and QUIC protocol.

We are happy to announce our attendance at FOSSASIA 2023, FOSSASIA is hold in Singapore from Thu, Apr 13, 8:30am (SGT) until Saturday, Apr 15, 6:30pm (SGT). You can find our team at the MySQL booth in the expo area and also attend any of the MySQL talks, including a MySQL Keynote as follows: Please […]

Indexes are crucial for optimizing query execution times in databases, but having an excessive number of indexes, or redundant ones, can negatively impact performance. While pt-duplicate-key-checker is the go-to tool for identifying duplicate or redundant indexes in MySQL, it may not catch all duplicates.

In this blog post, we’ll put ourselves to the test and see if we can identify duplicate and redundant indexes in MySQL. Toward the end, we will identify what the pt-duplicate-key-checker doesn’t.

The unique quiz

Consider the following MySQL table definition. Let’s put our brains to work and note any of the duplicate or redundant indexes (play fair, don’t cheat):

CREATE TABLE `table_with_lot_of_trouble` (
`id` int NOT NULL,
`col1` varchar(1) DEFAULT NULL,
`col2` varchar(2) DEFAULT NULL,
`col3` varchar(3) …

Fossasia 2023

Codership is pleased to announce a new Generally Available (GA) release of the multi-master Galera Cluster for MySQL 5.7, consisting of MySQL-wsrep 5.7.41 (release notes, download) and MySQL-wsrep 8.0.32 (release notes, download). This release incorporates all changes to MySQL 5.7.41 and MySQL 8.0.32 respectively, adding a …

For a long time, MyDumper has been the fastest tool to take Logical Backups. We have been adding several features to expand the use cases. Masquerade was one of these features, but it was only for integer and UUID values. In this blog post, I’m going to present a new functionality that is available in MyDumper and will be available in the next release: we added the possibility to build random data based on a format that the user defines.

How does it work?

During export, mydumper sends SELECT statements to the database. Each row is written one by one as an INSERT statement. Something important that you might not know, is that each column of a row can be transformed by a function. When you execute a backup, the default function is the identity function, as nothing needs to be changed. The function, which can be configured inside the defaults file, will change the …

Thank you for reading OpenLampTech, the PHP, MySQL, and LAMP stack media source. Like always, I am sharing the best content I can find and we can all learn so much from others. Do share the OpenLampTech newsletter with other developers who are interested.

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

In OpenLampTech issue #73, enjoy content on:

• WordPress and WooCommerce SQL VIEWs
• AI Prompts for PHP Developers
• MySQL Document Store Queries
• Working with PHP SoapClient
• And much much more

…

In this blog, I will share the steps I took to debug an error ‘ERROR 1030 (HY000): Got error 168 – ‘Unknown (generic) error from engine’ from storage engine’ while…

The post How to fix 1030 Unknown generic error from engine in MySQL first appeared on Change Is Inevitable.

Conference Video Slides MySQL Performance for Developers @ Percona Live 20231 PL23.pdf Efficient MySQL Performance @ Percona Live 2022 PL22.pdf Efficient MySQL Performance @ FOSDEM 2022 - Percona has not made Percona Live 2023 videos available. ↩︎