DESC sys.io_global_by_wait_by_bytes;
Field	Type	Null	Key	Default	Extra
event_name	varchar(128)	YES		NULL	
total	bigint unsigned	NO		NULL	
total_latency	varchar(11)	YES		NULL	
min_latency	varchar(11)	YES		NULL	
avg_latency	varchar(11)	YES		NULL	
max_latency	varchar(11)	YES		NULL	
count_read	bigint unsigned	NO		NULL	
total_read	varchar(11)	YES		NULL	
avg_read	varchar(11)	YES		NULL	
count_write	bigint unsigned	NO		NULL	
total_written	varchar(11)	YES		NULL	
avg_written	varchar(11)	YES		NULL	
total_requested	varchar(11)	YES		NULL	
SELECT * FROM sys.io_global_by_wait_by_bytes;
DESC sys.x$io_global_by_wait_by_bytes;
Field	Type	Null	Key	Default	Extra
event_name	varchar(128)	YES		NULL	
total	bigint unsigned	NO		NULL	
total_latency	bigint unsigned	NO		NULL	
min_latency	bigint unsigned	NO		NULL	
avg_latency	bigint unsigned	NO		NULL	
max_latency	bigint unsigned	NO		NULL	
count_read	bigint unsigned	NO		NULL	
total_read	bigint	NO		NULL	
avg_read	decimal(23,4)	NO		0.0000	
count_write	bigint unsigned	NO		NULL	
total_written	bigint	NO		NULL	
avg_written	decimal(23,4)	NO		0.0000	
total_requested	bigint	NO		0	
SELECT * FROM sys.x$io_global_by_wait_by_bytes;