Updated on 2024-05-07 GMT+08:00

LOCAL_IO_WAIT_INFO

Returns the real-time statistics of I/O control on the current node.

Table 1 LOCAL_IO_WAIT_INFO columns

Name

Type

Description

node_name

text

Node name.

device_name

text

Name of the data disk mounted to the node.

read_per_second

float

Number of read completions per second.

write_per_second

float

Number of write completions per second.

write_ratio

float

Ratio of the disk write I/Os to the total I/Os.

io_util

float

Percentage of the I/O time to the total CPU time per second.

total_io_util

integer

Level of the CPU time occupied by the last three I/Os. The value ranges from 0 to 6.

tick_count

integer

Interval for updating disk I/O information. The value is fixed to 1 second. The value is cleared each time before data is read.

io_wait_list_len

integer

Size of the I/O request thread wait queue. If the value is 0, no I/O is under control.