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Percona XtraBackup 8.4.0-7 (2026-0-)

Get started with Quickstart Guide for Percona XtraBackup.

Release highlights

Percona XtraBackup 8.4.0-7 release includes new features, improvements and bug fixes.

  • Improves test reliability across platforms by using a platform-independent stack trace check. The test no longer relies on handle_fatal_signal, which may not appear in resolved stack traces on some platforms.

  • Improves parallel processing performance by processing the largest files first. Starting larger tables and partitions earlier reduces the time spent waiting for large files after other parallel tasks have completed.

We recommend that you download the Percona XtraBackup for the same platform as the MySQL-compatible server. For example, if your server is on an ARM64 platform, you should download and use the Percona XtraBackup for ARM64 for that operating system.

Improvements

  • PXB-2553: Improves the bug766305.sh test reliability across platforms by using a platform-independent stack trace check. The test no longer depends on the presence of handle_fatal_signal, which may not appear in resolved stack traces on some platforms.

  • PXB-3502: Improves parallel processing performance by processing the largest files first. This approach allows larger tables and partitions to start processing earlier, reducing the time spent waiting for a large file after other parallel tasks have completed.

Bug fixes

  • PXB-3609: Fixed an issue where xbcloud delete did not remove MD5 checksum files from cloud storage for backups uploaded with the --md5 option.

  • PXB-3853: Fixed an issue where page-tracking incremental backups could read unchanged page ranges between blocks of changed pages. On large tablespaces, this behavior could cause incremental backups to read significantly more data than necessary and approach the I/O volume of a full scan.

  • PXB-3862: Fixed an issue where page-tracking incremental backups could perform slowly when a large portion of a tablespace had changed. When 25% or more of the pages in a tablespace have changed since the previous backup, Percona XtraBackup now switches that tablespace to a sequential full scan instead of reading the tracked pages individually. Other tablespaces continue to use page tracking.

  • PXB-3863: Fixed an issue where xbcloud could fail to upload or download backups from Azure Blob Storage containers with hierarchical namespace enabled.

Additional resources

Install Percona XtraBackup 8.4.0-7

The Percona XtraBackup GitHub repository

Download product binaries, packages, and tarballs at Percona Product Downloads