Note
This view is introduced since OceanBase Database V4.0.0.
Purpose
The V$OB_PARAMETERS view displays the parameters on the current OBServer node, including hidden parameters whose names start with an underscore.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| SVR_IP | varchar(46) | NO | The IP address of the OBServer node. |
| SVR_PORT | bigint(20) | NO | The port number of the OBServer node. |
| ZONE | varchar(128) | NO | The name of the zone. |
| SCOPE | varchar(64) | NO | The scope of the parameter. Valid values:CLUSTER: indicates a cluster-level parameter.TENANT: indicates a tenant-level parameter. |
| TENANT_ID | bigint(20) | YES | The ID of the tenant. Valid values:NULL: indicates that the parameter does not belong to any tenant. |
| NAME | varchar(128) | NO | The name of the parameter. |
| DATA_TYPE | varchar(128) | YES | The type of the parameter value.
NoteThe value of this column has been changed from |
| VALUE | varchar(65536) | NO | The value of the parameter. |
| INFO | varchar(4096) | NO | The description of the parameter. |
| SECTION | varchar(128) | NO | The module to which the parameter belongs. |
| EDIT_LEVEL | varchar(128) | NO | The way for the parameter modification to take effect. Valid values:READONLY: The parameter is read-only and cannot be modified.STATIC_EFFECTIVE: The parameter modification takes effect upon a restart.DYNAMIC_EFFECTIVE: The parameter modification takes effect dynamically. |
| DEFAULT_VALUE | varchar(65536) | NO | The default value of the parameter.
Note
|
| ISDEFAULT | varchar(3) | NO | Indicates whether the current value is the default value. Valid values:
Note
|
The following table describes the valid values of the DATA_TYPE column.
| Column value | Description | Example (in the NAME=VALUE format) |
|---|---|---|
| BOOL | A Boolean value. | enable_ddl=True |
| INT | An integer. | log_disk_percentage=1 |
| DOUBLE | A floating-point number. | server_cpu_quota_min=1.0 |
| STRING | A string. | leak_mod_to_check='NONE' |
| STR_LIST | A list of strings separated with semicolons (;). | config_additional_dir='etc2;etc3' |
| TIME | A period of time. | merger_check_interval='10m' |
| MOMENT | A point in time. | major_freeze_duty_time='02:00' |
| CAPACITY | A capacity, for example, 3M or 5G. |
log_disk_size='0M' |
| VERSION | A version. | compatible='4.3.0.0' |
| MODE | Indicates whether certain features of OBKV are enabled or disabled. | _obkv_feature_mode = 'ttl=off, rerouting=on' |
Sample query
Query the large_query_threshold parameter on all OBServer nodes of the current tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.V$OB_PARAMETERS WHERE NAME LIKE '%large_query_threshold%'\G
The query result is as follows:
*************************** 1. row ***************************
SVR_IP: 11.xx.xx.xx
SVR_PORT: 12615
ZONE: z1
SCOPE: CLUSTER
TENANT_ID: NULL
NAME: large_query_threshold
DATA_TYPE: TIME
VALUE: 5s
INFO: threshold for execution time beyond which a request may be paused and rescheduled as a \'large request\', 0ms means disable \'large request\'. Range: [0ms, +∞)
SECTION: TENANT
EDIT_LEVEL: DYNAMIC_EFFECTIVE
DEFAULT_VALUE: 5s
ISDEFAULT: NO
1 row in set
