21.5.10.17 The ndbinfo disk_write_speed_base Table

The disk_write_speed_base table provides base information about the speed of disk writes during LCP, backup, and restore operations.

The following table provides information about the columns in the disk_write_speed_base table. For each column, the table shows the name, data type, and a brief description. Additional information can be found in the notes following the table.

Column Name	Type	Description
node_id	integer	Node ID of this node
thr_no	integer	Thread ID of this LDM thread
millis_ago	integer	Milliseconds since this reporting period ended
millis_passed	integer	Milliseconds elapsed in this reporting period
backup_lcp_bytes_written	integer	Number of bytes written to disk by local checkpoints and backup processes during this period
redo_bytes_written	integer	Number of bytes written to REDO log during this period
target_disk_write_speed	integer	Actual speed of disk writes per LDM thread (base data)