Kernel Versioning for TiDB Cloud Premium

This document describes the versioning rules for the underlying database kernel used by TiDB Cloud Premium.

Kernel versioning

TiDB Cloud Premium kernel versions use the following time-based format:

TiDB-X-CLOUD.YYYYMM.x

For example:

TiDB-X-CLOUD.202510.1

Where:

• YYYYMM indicates the baseline code branch used to develop the kernel. For example, 202510 means that the baseline branch was created in October 2025. It does not indicate when the kernel version was released.
• x indicates the patch release number for that baseline branch.

For example, TiDB-X-CLOUD.202510.1 indicates that the kernel is based on a branch created in October 2025 and is the first patch release built from that branch.

Because kernel development and release schedules are independent, a kernel version might be released several months after its baseline branch is created.

Because TiDB Cloud Premium follows its own kernel release cadence, TiDB Cloud Premium release notes are published separately from TiDB Self-Managed release notes.

FAQ

Can I choose the kernel version for my TiDB Cloud Premium instance?

No. TiDB Cloud manages the entire kernel lifecycle for TiDB Cloud Premium.

TiDB Cloud automatically provides validated kernel versions for new deployments and performs managed upgrades when appropriate. This helps ensure security, stability, compatibility, and access to the latest features and improvements without requiring manual maintenance.