如何在 SYS 租户中设置普通租户的配置项与全局变量

obclient> SHOW PARAMETERS LIKE 'CPU_COUNT';
obclient> ALTER SYSTEM SET CPU_COUNT=10;

obclient> SHOW PARAMETERS LIKE 'writing_throttling_trigger_percentage' tenant=mysql;
obclient> ALTER SYSTEM SET writing_throttling_trigger_percentage=90 tenant=mysql;

obclient> SHOW PARAMETERS LIKE 'writing_throttling_trigger_percentage';
obclient> ALTER SYSTEM SET writing_throttling_trigger_percentage=90;

obclient> SHOW GLOBAL VARIABLES LIKE 'ob_query_timeout';
obclient> SET GLOBAL ob_query_timeout=20000000;

obclient [(none)]> SHOW PARAMETERS LIKE 'writing_throttling_trigger_percentage' tenant=mysql;
ERROR 1227 (42501): Access denied

obclient [(none)]> ALTER SYSTEM SET writing_throttling_trigger_percentage=100 tenant=mysql;
ERROR 1227 (42501): Access denied

obclient [oceanbase]> SHOW VARIABLES LIKE 'ob_query_timeout';
+------------------+----------+
| Variable_name    | Value    |
+------------------+----------+
| ob_query_timeout | 10000000 |
+------------------+----------+

obclient [oceanbase]> ALTER SYSTEM CHANGE TENANT mysql;
Query OK, 0 rows affected (0.00 sec)

obclient [oceanbase]> SHOW TENANT;
+---------------------+
| Current_tenant_name |
+---------------------+
| mysql               |
+---------------------+
1 row in set (0.03 sec)

obclient [oceanbase]> SET GLOBAL ob_query_timeout=20000000;
Query OK, 0 rows affected (0.01 sec)

obclient [oceanbase]> show global variables like 'ob_query%';
+------------------+----------+
| Variable_name    | Value    |
+------------------+----------+
| ob_query_timeout | 20000000 |
+------------------+----------+
1 row in set (0.00 sec)

obclient [oceanbase]> show variables like 'ob_query%';
+------------------+----------+
| Variable_name    | Value    |
+------------------+----------+
| ob_query_timeout | 10000000 |
+------------------+----------+
1 row in set (0.00 sec)