DESC sys.host_summary;
Field	Type	Null	Key	Default	Extra
host	varchar(255)	YES		NULL	
statements	decimal(64,0)	YES		NULL	
statement_latency	text	YES		NULL	
statement_avg_latency	text	YES		NULL	
table_scans	decimal(65,0)	YES		NULL	
file_ios	decimal(64,0)	YES		NULL	
file_io_latency	text	YES		NULL	
current_connections	decimal(41,0)	YES		NULL	
total_connections	decimal(41,0)	YES		NULL	
unique_users	bigint(21)	NO		0	
current_memory	text	YES		NULL	
total_memory_allocated	text	YES		NULL	
SELECT * FROM sys.host_summary;
DESC sys.x$host_summary;
Field	Type	Null	Key	Default	Extra
host	varchar(255)	YES		NULL	
statements	decimal(64,0)	YES		NULL	
statement_latency	decimal(64,0)	YES		NULL	
statement_avg_latency	decimal(65,4)	YES		NULL	
table_scans	decimal(65,0)	YES		NULL	
file_ios	decimal(64,0)	YES		NULL	
file_io_latency	decimal(64,0)	YES		NULL	
current_connections	decimal(41,0)	YES		NULL	
total_connections	decimal(41,0)	YES		NULL	
unique_users	bigint(21)	NO		0	
current_memory	decimal(63,0)	YES		NULL	
total_memory_allocated	decimal(64,0)	YES		NULL	
SELECT * FROM sys.x$host_summary;