sys.dm_resource_governor_resource_pool_volumes (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Managed Instance
Returns information about the current resource pool IO statistics for each disk volume. This information is also available at the resource pool level in sys.dm_resource_governor_resource_pools (Transact-SQL).
| Column name | Data type | Description |
|---|---|---|
pool_id |
int | The ID of the resource pool. Not nullable. |
volume_name |
sysname | The name of the disk volume. Not nullable. |
read_io_queued_total |
int | The total read IOs enqueued since resource governor statistics were reset. Not nullable. |
read_io_issued_total |
int | The total read IOs issued since resource governor statistics were reset. Not nullable. |
read_ios_completed_total |
int | The total read IOs completed since resource governor statistics were reset. Not nullable. |
read_ios_throttled_total |
int | The total read IOs throttled since resource governor statistics were reset. Not nullable. |
read_bytes_total |
bigint | The total number of bytes read since resource governor statistics were reset. Not nullable. |
read_io_stall_total_ms |
bigint | Total time (in milliseconds) between read IO arrival and completion. Not nullable. |
read_io_stall_queued_ms |
bigint | Total time (in milliseconds) between read IO arrival and issue. This is the delay introduced by the IO resource governance. Not nullable. |
write_io_queued_total |
int | The total write IOs enqueued since resource governor statistics were reset. Not nullable. |
write_io_issued_total |
int | The total write IOs issued since resource governor statistics were reset. Not nullable. |
write_io_completed_total |
int | The total write IOs completed since resource governor statistics were reset. Not nullable. |
write_io_throttled_total |
int | The total write IOs throttled since resource governor statistics were reset. Not nullable. |
write_bytes_total |
bigint | The total number of bytes written since resource governor statistics were reset. Not nullable. |
write_io_stall_total_ms |
bigint | Total time (in milliseconds) between write IO issue and completion. Not nullable. |
write_io_stall_queued_ms |
bigint | Total time (in milliseconds) between write IO arrival and issue. This is the delay introduced by the IO resource governance. Not nullable. |
io_issue_violations_total |
int | Total IO issue violations. That is, the number of times when the rate of IO issue was lower than the reserved rate. Not nullable. |
io_issue_delay_total_ms |
bigint | Total time (in milliseconds) between the scheduled issue and actual issue of IO. Not nullable. |
Permissions
Requires VIEW SERVER STATE permission.
Permissions for SQL Server 2022 and later
Requires VIEW SERVER PERFORMANCE STATE permission on the server.