GLOBAL_REDO_STATUS

GLOBAL_REDO_STATUS displays the replaying of logs about instances in the entire cluster.

**Table 1** GLOBAL_REDO_STATUS columns
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 replay in the current instance log.
read_data_io_total_dur	bigint	Total I/O duration reads during replay in the current instance log.
write_data_io_counter	bigint	Number of data page I/O writes during replay in the current instance log.
write_data_io_total_dur	bigint	Total I/O duration writes during replay in the current instance log.
process_pending_counter	bigint	Number of synchronization times of log distribution threads during replay in the instance log.
process_pending_total_dur	bigint	Synchronization duration of log distribution threads during replay in the instance log.
apply_counter	bigint	Number of synchronization times of replay threads during replay in the instance log.
apply_total_dur	bigint	Synchronization duration of replay threads during replay in the instance log.
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. For details about the cm_ctl command, see "Unified Cluster Management Tool" in Tool Reference.
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.