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20.5.14.17 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)