GLOBAL_REDO_STATUS
GLOBAL_REDO_STATUS displays the replaying of logs about instances in the entire cluster.
Name |
Type |
Description |
---|---|---|
node_name |
text |
Instance name. |
redo_start_ptr |
bigint |
Start point for replaying the instance logs. |
redo_start_time |
bigint |
Start time (UTC) when the instance logs are replayed. |
redo_done_time |
bigint |
End time (UTC) when the instance logs are replayed. |
curr_time |
bigint |
Current time (UTC) of the instance. |
min_recovery_point |
bigint |
Minimum barrier for the current instance log to provide services after the replay is complete. |
read_ptr |
bigint |
Position for reading the instance logs. |
last_replayed_read_ptr |
bigint |
Position for replaying the instance logs. |
recovery_done_ptr |
bigint |
Replay position after the instance is started. |
read_xlog_io_counter |
bigint |
Number of I/Os when the current instance reads and replays logs. |
read_xlog_io_total_dur |
bigint |
Total I/O duration when the current instance reads and replays logs. |
read_data_io_counter |
bigint |
Number of data page I/O reads during log replay in the current instance. |
read_data_io_total_dur |
bigint |
Total I/O duration reads during log replay in the current instance. |
write_data_io_counter |
bigint |
Number of data page I/O writes during log replay in the current instance. |
write_data_io_total_dur |
bigint |
Total I/O duration writes during log replay in the current instance. |
process_pending_counter |
bigint |
Number of synchronization times of log distribution threads during log replay in the current instance. |
process_pending_total_dur |
bigint |
Synchronization duration of log distribution threads during log replay in the current instance. |
apply_counter |
bigint |
Number of synchronization times of replay threads during log replay in the current instance. |
apply_total_dur |
bigint |
Synchronization duration of replay threads during log replay in the current instance. |
speed |
bigint |
Log replay rate of the current instance. The value is updated every time when a 256-MB log is replayed. The unit is byte/s. In a cluster environment, you are advised to run the cm_ctl query -rv command to obtain a more accurate replay speed of the standby node. |
local_max_ptr |
bigint |
Maximum number of replay logs received by the localhost after the instance is started. |
primary_flush_ptr |
bigint |
Log point where the host flushes logs to a disk. |
worker_info |
text |
Replay thread information of the instance. If parallel replay is not enabled, the value is NULL. |
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