sys.dm_os_ring_buffers
osDescription
Each row represents a record in a ring buffer of a specific type. Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. Not nullable. The type of the ring buffer record. Not nullable. The time when a ring buffer record was added, in milliseconds since the computer started. Not nullable. Identified for informational purposes only. Not supported unless described in the official Microsoft product documentation, or used as directed by Microsoft for diagnostic and troubleshooting purposes. Future compatibility is not guaranteed. Nullable. Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. Not nullable. SQL Server 2025 (17.x) Preview
Syntax
sys.dm_os_ring_buffers
Remarks
Each row represents a record in a ring buffer of a specific type.
Identified for informational purposes only. Not supported. Future
compatibility is not guaranteed. Not nullable.
The type of the ring buffer record. Not nullable.
The time when a ring buffer record was added, in milliseconds
since the computer started. Not nullable.
Identified for informational purposes only. Not supported unless
described in the official Microsoft product documentation, or
used as directed by Microsoft for diagnostic and troubleshooting
purposes. Future compatibility is not guaranteed. Nullable.
Identified for informational purposes only. Not supported. Future
compatibility is not guaranteed. Not nullable.
2025 (17.x) Preview
The time when a ring buffer record was added, in the local time
of the Database Engine instance. Not nullable.
2025 (17.x) Preview
A ring buffer is a memory structure within the Database Engine that is limited to a fixed
number of records. As new records arrive, older records are removed.
Records in ring buffers contain diagnostic data for the Database Engine. Most ring buffer types
are used for internal purposes and aren’t supported, unless described in the official Microsoft
product documentation. For example, you can
use ring buffers to obtain health information
about Always On availability groups