The system table SYSINFO.HOTSTANDBYGROUP describes which information the hot standby instance from which the information about this system table is being requested has about other standby instances.
LOCALNODE |
CHAR(64) |
Name by 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 in the log area sent by the master instance up to which the standby instances can redo the log entries |
FIRSTNEEDEDLOGOFFSET |
FIXED(10) |
Oldest position in the log area up to which the master instance can write without overwriting the log pages required by the 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 |
Database Administration, Architecture of a Hot Standby System