MySQL 9.4 Reference Manual Including MySQL NDB Cluster 9.4
The disk_write_speed_aggregate_node table
provides aggregated information per node about the speed of disk
writes during LCP, backup, and restore operations.
The disk_write_speed_aggregate_node table
contains the following columns:
node_id
Node ID of this node
backup_lcp_speed_last_sec
Number of bytes written to disk by backup and LCP processes in the last second
redo_speed_last_sec
Number of bytes written to the redo log in the last second
backup_lcp_speed_last_10sec
Number of bytes written to disk by backup and LCP processes per second, averaged over the last 10 seconds
redo_speed_last_10sec
Number of bytes written to the redo log each second, averaged over the last 10 seconds
backup_lcp_speed_last_60sec
Number of bytes written to disk by backup and LCP processes per second, averaged over the last 60 seconds
redo_speed_last_60sec
Number of bytes written to the redo log each second, averaged over the last 60 seconds