This topic describes the CONGESTION_CONTROL diagnostic point.
The CONGESTION_CONTROL diagnostic point records access control information. The following table describes the diagnostic information at the CONGESTION_CONTROL diagnostic point.
Field |
Description |
Remarks |
|---|---|---|
| svr_addr | The replica address for access control. | N/A |
| alive_congested/dead_congested/detect_congested | Indicates whether the OBServer node is unavailable. | The value true indicates that the OBServer node is unavailable. In this case, OceanBase Database Proxy (ODP) will reselect an OBServer node. If the value is false, this field is not returned in the diagnostic information of this diagnostic point. |
| force_retry_congested | Indicates whether to force use the replica when it is unavailable. | The value true specifies to ignore the unavailability of the OBServer node and force establish a connection. |
| need_congestion_lookup | Indicates whether to perform access control. | The value true specifies not to perform access control. Access control is not required in special routing. For example, if you specify the IP address 127.0.0.1 for routing and configure rerouting to a distributed transaction coordinator, access control is not required. |
| lookup_success | Indicates whether the query to access control information is successful. | The value false indicates a query failure. In this case, the connection will be disconnected. If the value is true, this field is still returned in the diagnostic information of this diagnostic point. |
| entry_exist | Indicates whether the access control information corresponding to svr_addr exists. |
The value false indicates that the corresponding allowlist and blocklist information does not exist. In this case, ODP considers that this OBServer node is in the DEAD_CONGESTED state and triggers a retry. |