Note
- For V4.3.x, this parameter is available starting with V4.3.3.
- For V4.2.x, this parameter is available starting with V4.2.4.
Description
audit_log_buffer_size specifies the buffer size for asynchronous log writing.
Applicability
This topic applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition does not support audit logs.
Privilege requirements
Query the parameter
The
systenant and all user tenants can query this parameter by using theSHOW PARAMETERSstatement or theGV$OB_PARAMETERSview.Modify the parameter
The
systenant and user tenants can use theALTER SYSTEM SETstatement to modify this parameter.
Attributes
| Attribute | Description |
|---|---|
| Type | Capacity |
| Default value | 16M |
| Value range | [16M, 256M] |
| Modifiable | Yes. You can use the ALTER SYSTEM SET statement to modify the parameter. |
| Effective upon OBServer node restart | No. The setting takes effect immediately. |
Considerations
When you use the asynchronous method to write audit logs, the working thread requests memory from a buffer and places it in the I/O queue. This parameter specifies the buffer size.
Examples
Set the buffer size for asynchronous log writing to 16M.
obclient> ALTER SYSTEM SET audit_log_buffer_size='16M';