The latest from the MySQL community

As an update to our recent blog post, “Where can you find MySQL next? (Updated events list for March–May 2026)” we’d like to share the latest confirmed MySQL events and webinars, including newly added ones plus refreshed details for sessions we already announced. Since plans and agendas evolve quickly, this post is intended to provide […]

As part of our MySQL community engagement plan, which includes delivering new features into MySQL Community Edition, increasing collaboration and transparency, and expanding and growing the MySQL Ecosystem, we have created a new rhythm of public MySQL Community Discussions—starting with our first session on February 25 and continuing with our second session on March 23, […]

You ship a query on Monday. It runs in 2 ms. Six months later, the same query — same SQL, same indexes — takes 4 seconds. Nothing changed. Except one thing did: the table grew.

Welcome to the everyday problem Big O was invented to describe. This post is a practical, MySQL-flavoured tour of time complexity. We’ll keep the math light, the pictures clear, and we’ll finish with the exact algorithms your database uses to keep your queries fast (or slow).

What is Big O, really?

Forget seconds. Big O is not a unit of time. It’s a way of describing how the cost of an algorithm grows as the input grows. Specifically: if you double the data, does the work double? Stay the same? Quadruple? That shape is the algorithm’s complexity.

We call the input size n. A few shapes come up over and over in real systems:

• O(1) — …

Production data is invaluable for day-to-day operations—support, troubleshooting, analytics, and development. But when that data contains sensitive fields such as SSNs, emails, phone numbers, or other identifiers, broad read access can quickly become unnecessary exposure.  Just as importantly, many organizations operate under regulatory and contractual requirements that expect strong controls around access to sensitive data—often including data masking as […]

Production data is invaluable for day-to-day operations—support, troubleshooting, analytics, and development. But when that data contains sensitive fields such as SSNs, emails, phone numbers, or other identifiers, broad read access can quickly become unnecessary exposure.  Just as importantly, many organizations operate under regulatory and contractual requirements that expect strong controls around access to sensitive data—often including data masking as […]

MySQL 9.7.0 LTS landed today, and we had the pleasure of watching the announcement live — and we were the first ones to download. If you've already pulled the binaries and you're poking at it in a lab, here's the news: Readyset already supports it.

The point isn't that Readyset happens to work with 9.7. The point is that we were prepared for the launch. Our compatibility matrix has been running 9.7 pre-release builds, so the same readysettech/readyset:latest image you can docker pull right now already accepts 9.7 as an upstream. Today's job is to prove it, not to port it.

Step 1 - Register MySQL 9.7 as an rdst target

rdst stores connection profiles in ~/.rdst/config.toml. One non-interactive command adds the target, and the …

MySQL is extending caching_sha2_password to support PBKDF2 with SHA-512 as a new password storage format. This is a meaningful step forward for password security because it strengthens stored password transformations without requiring a new authentication plugin, without breaking clients, and without forcing an all-at-once migration. Existing accounts continue to work, new passwords can use the stronger format, and administrators […]

Overview Some MySQL distribution packages, such as the generic Linux build, bundle an OpenSSL dependency within the same .tar.gz archive. With the new MySQL 8.0.46, 8.4.9 and 9.7.0 releases, we are upgrading those bundled packages from using OpenSSL 3.0 to the new OpenSSL 3.5 LTS branch. Native OS packages, such as .rpm and .deb, continue […]

The following report is covering performance evaluation of the currently available OpenSSL releases when they are used by MySQL in CPU-intensive OLTP workloads. However, the main focus is on OpenSSL-3.5.5, which will be used by default in the next MySQL releases.

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With MySQL 9.7.0 LTS, MySQL establishes its next long-term support release line, expands key capabilities in Community Edition, and introduces Dynamic Data Masking for Enterprise users. The April releases mark an important milestone for MySQL. With the GA of MySQL 9.7.0 LTS, MySQL moves from the 9.x innovation series to a new Long-Term Support release line. This begins […]