oracle内存查询

select current_size from v$buffer_pool;
 
select * from v$sga;

select df.tablespace_name "表空间名",totalspace "总空间M",freespace "剩余空间M",
round((1-freespace/totalspace)*100,2) "使用率%"
from
(select tablespace_name,round(sum(bytes)/1024/1024) totalspace
from dba_data_files
group by tablespace_name) df,
(select tablespace_name,round(sum(bytes)/1024/1024) freespace
from dba_free_space
group by tablespace_name) fs
where df.tablespace_name=fs.tablespace_name;