Note
- For V4.3.x, this parameter was introduced in V4.3.3.
- For V4.2.x, this parameter was introduced in V4.2.4.
Description
audit_log_buffer_size specifies the buffer size for asynchronous log writing.
Applicability
This content applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition does not support the auditing feature.
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 modify this parameter by using theALTER SYSTEM SETstatement.
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. |
Usage
When audit logs are written asynchronously, the worker thread requests memory from a buffer and places it in the I/O queue. This parameter specifies the size of the buffer.
Example
Set the buffer size for asynchronous log writing to 16M.
obclient> ALTER SYSTEM SET audit_log_buffer_size='16M';