21.6.14.17 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 disk_write_speed_base table contains the following columns:

• node_id

  Node ID of this node

• thr_no

  Thread ID of this LDM thread

• millis_ago

  Milliseconds since this reporting period ended

• millis_passed

  Milliseconds elapsed in this reporting period

• backup_lcp_bytes_written

  Number of bytes written to disk by local checkpoints and backup processes during this period

• redo_bytes_written

  Number of bytes written to REDO log during this period

• target_disk_write_speed

  Actual speed of disk writes per LDM thread (base data)