Planet MySQL HA Blog

Before we start, what is active-active?

Active-active, also referred to as multi-primary, is a setup where multiple database nodes can accept writes at the same time and propagate those changes to the others. In comparison, regular streaming replication in PostgreSQL allows only one node (the primary) to accept writes. All other nodes (replicas) are read-only and follow changes.

In an active-active setup:

• There is no single point of write.
• Applications can write to any node.
• The database needs a way to sort out…

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HeatWave MySQL continues to evolve, bringing powerful enhancements that bolster security, improve backup retention, and streamline partition management. Over the last two quarters (March–June 2025), several notable updates have been introduced, enhancing security controls, optimizing data management, and delivering greater flexibility for developers and businesses alike.

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Security is a foundational principle for cloud deployments, especially when dealing with mission-critical workloads like those managed by HeatWave MySQL. As applications and environments scale, fine-grained network control becomes critical not just for protecting sensitive data, but also for isolating systems, enforcing boundaries, and minimizing lateral movement within a Virtual Cloud Network (VCN).

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I recently troubleshoot an interesting MySQL crash, and I think it is worth sharing (with the related bugs).  MySQL crashed when the disk was full, you can see the free disk graph below.  The Y-axis is in the tens of GiB scale and the X-axis is in the hour scale.  Can you guess what happened ? Just to make sure we agree on the meaning of the graph above, let's describe it

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As I wrote in a LinkedIn post, I am working on a blog post related to binary logging of big transactions.  I thought I would split this post in two, so here is the first part where I cover the recent binary logging optimization in MariaDB and its unspoken advantage. (And this post is a way for me to see if Planet MySQL is still blocking posts mentioning MariaDB.  This censorship /

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PMM 3.2.0 brings some long-awaited fixes and new capabilities. You can now install PMM Client on Amazon Linux 2023 with proper RPM packages, get complete MySQL 8.4 replication monitoring, and track MongoDB backups directly in PMM.

Here’s what’s most important in this release:

1. Native Amazon Linux 2023 support - no more workarounds

What’s new: If you’ve been running PMM Client on AL2023 and dealing with complex manual installations, those days are over. You can now install PMM Client through native RPM packages just like any other supported platform.

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For the Financial services Industry, PCI DSS compliance ensures the secure handling of cardholder data by organizations that process, store, or transmit credit card information. Payment Card Data Security Standard (PCI DSS) is designed to protect card holder information and ensure a secure environment for handling credit card data.While this is primarily used to secure credit card data, adhering to PCI DSS standards ensures overall security of your applications.

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Keeping a close eye on MySQL databases is essential for maintaining top-notch performance, reliability, and security. For many years, MySQL Enterprise Monitor (MEM) was the go-to tool for monitoring, providing basic alerts, performance graphs, and straightforward query analysis. However, since it was phased out in January 2025, organizations have been looking for modern alternatives, with […]

The post Replacing MySQL Enterprise Monitor with Enterprise Manager appeared first on Severalnines.

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Transparent Data Encryption (TDE) in Oracle HeatWave MySQL, a fully managed database service within Oracle Cloud Infrastructure (OCI), is a security feature that protects sensitive data at rest by encrypting database files at the storage level without requiring application changes. It provides industrial level data protection from unauthorized access while meeting compliance regulations like GDPR, PCI DSS and HIPAA.

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In an era where customer expectations are higher than ever, and businesses must adapt to ever-changing technological landscapes, Pegadaian’s choice to implement MySQL Enterprise Edition has proven to be a strategic move. By upgrading their database infrastructure, the company has enhanced its application quality, ensured reliability, and most importantly, continued to deliver the high level of service that its customers expect. Read the full story.

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