GLOBAL_IO_WAIT_INFO

Returns the real-time statistics of I/O control on all nodes.

**Table 1** GLOBAL_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.