When using the Percona Operator for MySQL based on Percona XtraDB Cluster (PXC), it’s common to encounter scenarios where cluster nodes request a full State Snapshot Transfer (SST) when rejoining the cluster. One typical scenario where a State Snapshot Transfer (SST) is required is when a node has been offline long enough that the GCache […]

In Percona Server for MySQL 8.0.41 / 8.4.4, we significantly re-designed the Data Masking Component. In particular, we made the following changes: Changed the user on behalf of whom we execute internal queries for dictionary operations. Introduced an in-memory dictionary term cache that allows significant speed-up of dictionary operations. Introduced masking_dictionaries_flush() User Defined Function. Introduced […]

In Percona Server for MySQL 8.0.41 / 8.4.4, we introduced several improvements in Encryption User-Defined Functions. Added support for RSAES-OAEP (OAEP) padding for RSA encrypt / decrypt operations. Added support for RSASSA-PSS (PSS) padding for RSA sign / verify operations. Added new encryption_udf.legacy_padding_scheme component system variable. Normalized character set support for all Encryption UDFs. PKCS1 […]

When performing backups, reducing the amount of time your server is locked can significantly improve performance and minimize disruptions. Percona XtraBackup 8.4 Pro introduces improvements in how DDL (Data Definition Language) locks (aka Backup Locks) are managed, allowing for reduced locking during backups. In this post, we’ll explore the impact of these enhancements. TL;DR (Summary) […]

In this blog, we will look at the differences between LTS (Long Term Stable) versions of Percona Server for MySQL. Released in April 2019, MySQL 8.0 represented a major change from the previous version, 5.7, introducing significant changes to the data dictionary and enabling many features and enhancements. It also provided no direct downgrade path, […]

Percona is excited to announce the community release of our MySQL 5.7 End-of-Life (EOL) source code for both Percona Server for MySQL (PS) version 5.7.44-52 and Percona XtraDB Cluster (PXC) version 5.7.44-31.65.5. This release is an accumulation of several customer-only releases we’ve done as part of our post-EOL support for MySQL 5.7, and we’re happy […]

This article will be helpful if you use the Percona Monitoring and Management (PMM) instance and alert notifications, as it is nice to capture the image of the graph when you receive the alert. We will see how to capture and attach the image of the graph when receiving the alert notification (email, telegram, Slack, […]

This blog post explains the cause of “ERROR 1412 (HY000): Table definition has changed, please retry transaction” with the specific Isolation level settings. Background As per the MySQL documentation, this error should occur for “operations that make a temporary copy of the original table and delete the original table when the temporary copy is built.” […]

This blog is not intended to offer anything extraordinary; instead, consider it an anecdote, a lesson, or simply a proper way of doing things without the need to run a test when in doubt. That said, I must emphasize that, as always, testing everything before deploying to production is essential. Let’s dive into the story: […]

Even though I used a dedicated Kubernetes cluster to host my test database, I had this belief that by not explicitly allocating (or requesting, in Kubernetes vocabulary) CPU resources to my Percona XtraDB Cluster (PXC) pods or yet making just a small request, Kubernetes could be delaying access to the free CPU cycles available on […]