监控undo空间和临时段的使用情况

--1.监控undo空间情况
select tablespace_name,round(sum(bytes)/(1024*1024),2) free_space
  from dba_free_space
 where tablespace_name='UNDOTBS1'
 group by tablespace_name;

TABLESPACE_NAME FREE_SPACE
------------------------------ ----------
UNDOTBS1 167.44

--2.监控临时段的使用情况
select sum(nvl(blocks,0))*8/1024 Msize from v$sort_usage;