DESC sys.host_summary_by_file_io;
Field	Type	Null	Key	Default	Extra
host	varchar(60)	YES		NULL
ios	decimal(42,0)	YES		NULL
io_latency	text	YES		NULL
SELECT * FROM sys.host_summary_by_file_io;
DESC sys.x$host_summary_by_file_io;
Field	Type	Null	Key	Default	Extra
host	varchar(60)	YES		NULL
ios	decimal(42,0)	YES		NULL
io_latency	decimal(42,0)	YES		NULL
SELECT * FROM sys.x$host_summary_by_file_io;
