Welcome back to another issue of OpenLampTech, your source for original and curated MySQL, PHP, and LAMP stack content. We have another packed issue this week. Thanks for reading!

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 #39 we are looking at articles covering:

• PHP traits
• MySQL indexes
• Fetching data with Laravel and AJAX
• PHP local development tools
• And much much more.

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Let’s try Azure Database for MySQL

Introduction

Did you know that you can run MySQL on Microsoft Azure for free for 30 days with a $200 credit? In this first blog I’ll show how to create a MySQL Server and provide few information related to this service. In futures blogs I’ll present insights regarding MySQL performances and backup/recovery.

Let’s start by registering ourselves

The registration process lasts approximately 5 to 10 minutes. We simply have to enter our contacts details as well as our credit card details. Don’t worry, no fees are automatically charged. Once your 200$ credit limit used, Microsoft will ask us if we want to keep on with the payment of the additional fees.  

In order to register ourselves on Microsoft Azure, we can simply go on the following URL: …

Percona XtraDB Cluster (PXC) is a database clustering solution for MySQL. It ensures high availability, prevents downtime and data loss, and provides linear scalability for a growing environment.

Lately, the number of questions about how to build Percona software has increased. More and more people try to add their own patches, add some modifications, and build software by themselves. But this raises the question of how to do this in the same way as Percona does, as sometimes the compiler flag can make a drastic impact on the final binary. This is a really essential question and let’s look at how we build Percona XtraDB Cluster here at Percona.

At the first glance, the building process is not something difficult. Everyone knows that magic make install all command and suppose that as a result everything will be …

In Percona Server for MySQL 8.0.29-21, we added one more patch that helps us to build server code on macOS. To be precise here, we still could do this even before this patch but only partially. Now it is possible to build RocksDB Storage Engine as well.

A word of disclaimer here, at the moment, by macOS we still understand macOS for Intel x86_64 architecture (the most recent ARM versions with Apple M1 / M2 processors are out of the scope of this blog post). Moreover, Percona does not provide …

This blog post will discuss the newest feature available in MySQL 8.0.30: dynamic redo log sizing. After the InnoDB buffer pool size, we can say that having a proper size for the redo logs is crucial for MySQL performance. There are numerous blog posts about how to calculate a good redo log size. One of our classic blog posts is this one from Baron: How to calculate a good InnoDB log file size (That blog post is from 2008 and is still a valid formula to use.)

Now, which problem is this feature trying to solve?

In MySQL, the buffer pool and redo log size are settings that do not change frequently. Usually, these settings are set during database installation; after that, they are forgotten until an issue arises. The problem is that they used to be static, which means that you had to restart MySQL so the changes …

Introduction In this article, we are going to see how MySQL rewriteBatchedStatements works when using JDBC, JPA, or Hibernate. I first researched this MySQL configuration property when I was writing the batching chapter of my High-Performance Java Persistence book, and, back then, I discovered that this setting allows batching plain Statement by rewriting the SQL string that is sent to the database. However, the MySQL 6 Connector/J documentation mentioned that: for prepared statements, server-side prepared statements can not currently take advantage of this rewrite option So, for a long time, I wrongly... Read More

The post MySQL rewriteBatchedStatements configuration property appeared first on Vlad Mihalcea. …

We have another massive newsletter for you this week. And OpenLampTech is growing! Thank you for making it a success!

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.

This week in OpenLampTech issue #38, we have content covering:

• MySQL Indexes
• PHP boolean comparisons
• Yoda Conditions
• Installing WordPress on LAMP
• And much more

Get your brand, product, or service the attention it needs with affordable classified ad placement in …

In part one and part two of this series, we introduced the different ways to manage MySQL configurations and precedence when using the Percona XtraDB Cluster (PXC) object and ConfigMap. In this post, we will see the precedence when secrets are used for MySQL configurations in Percona Operator for MySQL based on Percona XtraDB Cluster.

CASE-4: Secret with name cluster1-pxc and ConfigMap with name cluster1-pxc but without configuration in PXC object

When the MySQL configuration is present in the ConfigMap and secret but not in the PXC …

Just as you want to filter the rows of data returned in a SELECT query with the equality comparison operator (=), you can also create a conditional filter to test if 2 values are not equal to one another. Learn more in the following article.

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.

Image by Peggy und Marco Lachmann-Anke from  …

In part one of this series, we introduced the different ways to manage MySQL configurations. In this post, we will walk through different possibilities and the changes happening while modifying MySQL configurations with the operator.

Percona Distribution for MySQL Operator based on Percona XtraDB Cluster (PXC) provides three ways for managing MySQL, but the question is, what is the precedence among options? We will walk through several cases of using MySQL configs. For the sake of simplicity, we will play with the values of the Galera cache to see the effects.

configuration: |
   [mysqld] …