• redo_speed_last_sec 

Number of bytes written to 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 REDO log per 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 disk by backup and LCP processes per second, averaged over the last 60 seconds 

## 23.5.14.27 The ndbinfo diskpagebuffer Table 

The diskpagebuffer  table provides statistics about disk page buffer usage by NDB Cluster Disk Data tables. 

The diskpagebuffer  table contains the following columns: 

• node_id 

The data node ID 

• block_instance 

Block instance 

• pages_written 

Number of pages written to disk. 

• pages_written_lcp 

Number of pages written by local checkpoints. 

• pages_read 

Number of pages read from disk 

• log_waits 

Number of page writes waiting for log to be written to disk 

• page_requests_direct_return 

Number of requests for pages that were available in buffer 

• page_requests_wait_queue 

