監控資料庫表空間使用情況

1.按使用者查表空間使用情況

select a.tablespace_name 表空間名稱,total_space/(1024*1024) 總量,free_space/(1024*1024) 剩餘量,

trunc((free_space/total_space)*100)||'%' 剩餘比例

from

(select tablespace_name,sum(bytes) free_space from dba_free_space

group by tablespace_name) a,

(select tablespace_name,sum(bytes) total_space from dba_data_files

group by tablespace_name) b

where a.tablespace_name = b.tablespace_name order by (free_space/total_space )

2.查詢某個使用者的表占用空間大小

select segment_name,segment_type,tablespace_name,bytes,initial_extent,

next_extent from dba_segments where owner='cal' order by bytes desc;

3.監控資料庫表空間使用情況

select d.tablespace_name,space "sum_space(m)",blocks sum_blocks,space-nvl(free_space,0) "used_space(m)",

round((1-nvl(free_space,0)/space)*100,2) "used_rate(%)",free_space "free_space(m)"

from (select tablespace_name,round(sum(bytes)/(1024*1024),2) space,sum(blocks) blocks from dba_data_files group by tablespace_name) d,

(select tablespace_name,round(sum(bytes)/(1024*1024),2) free_space from dba_free_space group by tablespace_name) f

where d.tablespace_name = f.tablespace_name(+)

union all

select d.tablespace_name,space "sum_space(m)",blocks sum_blocks,used_space "used_space(m)",

round(nvl(used_space,0)/space*100,2) "used_rate(%)",nvl(free_space,0) "free_space(m)"

from (select tablespace_name,round(sum(bytes)/(1024*1024),2) space,sum(blocks) blocks from dba_temp_files group by tablespace_name) d,

(select tablespace_name,round(sum(bytes_used)/(1024*1024),2) used_space,round(sum(bytes_free)/(1024*1024),2) free_space

from v$temp_space_header group by tablespace_name) f

where d.tablespace_name=f.tablespace_name(+);