Number of times that a get_page()  call has resulted in a wait for I/O or completion of I/O already begun during the past second 

• get_page_reqs_completed 

Number of get_page()  calls waiting for I/O or I/O completion that have completed during the past second 

## Notes 

Each row in this table corresponds to an instance of PGMAN ; there is one such instance per LDM thread plus an additional instance for each data node. 

## 23.5.14.29 The ndbinfo diskstats_1sec Table 

The diskstat  table was added in NDB 8.0.19. 

The diskstats_1sec  table provides information about writes to Disk Data tablespaces over the past 20 seconds. 

The diskstat  table contains the following columns: 

• node_id 

Node ID of this node 

• block_instance 

ID of reporting instance of PGMAN 

• pages_made_dirty 

Pages made dirty during the designated 1-second interval 

• reads_issued 

Reads issued during the designated 1-second interval 

• reads_completed 

Reads completed during the designated 1-second interval 

• writes_issued 

Writes issued during the designated 1-second interval 

• writes_completed 

Writes completed during the designated 1-second interval 

• log_writes_issued 

Number of times a page write has required a log write during the designated 1-second interval 

• log_writes_completed 

Number of log writes completed during the designated 1-second interval 

