The system table HOTSTANDBYGROUP contains information about the other hot standby instances in the hot standby system.
HOTSTANDBYGROUP
LOCALNODE |
CHAR(64) |
Name with which the instance can be addressed |
ADDNODEDATE |
TIMESTAMP |
Time at which the instance was added to the hot standby configuration |
REMOVENODEDATE |
TIMESTAMP |
Time at which the instance was removed from the hot standby configuration |
STATE |
CHAR(20) |
Status of the instance (UNKNOWN, PREPARE STANDBY, WAIT FOR SYNCHRONIZE, DEACTIVATED, REGISTER STANDBY, REMOVED, ADDED) |
PREPARESTANDBYDATE |
TIMESTAMP |
Time at which the instance received the last PREPARE STANDBY statement |
REGISTERSTANDBYDATE |
TIMESTAMP |
Time at which the instance received the last RECEIVE STANDBY statement |
SYNCHRONIZEDATE |
TIMESTAMP |
Time at which the instance sent the last SYNCHRONIZE statement |
SUCCESSFULSYNCHRONIZEDATE |
TIMESTAMP |
Time at which last successful SYNCHRONIZE statement was executed |
LASTVALIDLOGOFFSETSENT |
FIXED(10) |
Last position sent by the master instance in the log area up to which log entries can be applied by the standby instances |
FIRSTNEEDELOGOFFSET |
FIXED(10) |
Oldest position in log area up to which the master instance can write without overwriting log pages required by standby instances |
SYNCHRONIZESENDCOUNT |
FIXED(10) |
Number of sent SYNCHRONIZE statements |
SYNCHRONIZERETRYCOUNT |
FIXED(10) |
Number of SYNCHRONIZE statements that have failed since last successful SYNCHRONIZE statement |
See also:
Concepts of the Database System, Architecture of a Hot Standby System