1. 檢視所有表空間大小
sql> select tablespace_name,sum(bytes)/1024/1024from dba_data_files
2 group by tablespace_name;
2. 已經使用的表空間大小
sql> select tablespace_name,sum(bytes)/1024/1024from dba_free_space
2 group by tablespace_name;
3. 所以使用空間可以這樣計算
select a.tablespace_name,total,free,total-free usedfrom
( select tablespace_name,sum(bytes)/1024/1024 totalfrom dba_data_files
group bytablespace_name) a,
( select tablespace_name,sum(bytes)/1024/1024 freefrom dba_free_space
group bytablespace_name) b
where a.tablespace_name=b.tablespace_name;
4. 下面這條語句檢視所有segment的大小。
select segment_name,sum(bytes)/1024/1024 fromuser_extents group by segment_name
5. 還有在命令**況下如何將結果放到乙個檔案裡。
sql> spool out.txt
sql> select * from v$database;
sql> spool off
select upper(f.tablespace_name) "表空間名",
d.tot_grootte_mb"表空間大小(m)",
d.tot_grootte_mb -f.total_bytes "已使用空間(m)",
to_char(round((d.tot_grootte_mb- f.total_bytes) / d.tot_grootte_mb * 100,
2),
'990.99') "使用比",
f.total_bytes "空閒空間(m)",
f.max_bytes "最大塊(m)"
from (selecttablespace_name,
round(sum(bytes) /(1024 * 1024), 2) total_bytes,
round(max(bytes) /(1024 * 1024), 2) max_bytes
fromsys.dba_free_space
group bytablespace_name) f,
(selectdd.tablespace_name,
round(sum(dd.bytes) /(1024 * 1024), 2) tot_grootte_mb
from sys.dba_data_filesdd
group bydd.tablespace_name) d
whered.tablespace_name = f.tablespace_name
order by 4 desc
--查詢表空間使用情況
selectupper(f.tablespace_name) "表空間名",
d.tot_grootte_mb"表空間小(m)",
d.tot_grootte_mb -f.total_bytes "已使用空間(m)",
to_char(round((d.tot_grootte_mb- f.total_bytes) / d.tot_grootte_mb * 100,2),'990.99') || '%' "使用比",
f.total_bytes "空閒空間(m)",
f.max_bytes "最塊(m)"
from (selecttablespace_name,
round(sum(bytes) /(1024 * 1024), 2) total_bytes,
round(max(bytes) /(1024 * 1024), 2) max_bytes
fromsys.dba_free_space
group bytablespace_name) f,
(selectdd.tablespace_name,
round(sum(dd.bytes)/ (1024 * 1024), 2) tot_grootte_mb
fromsys.dba_data_files dd
group bydd.tablespace_name) d
where d.tablespace_name= f.tablespace_name
order by 1
--查詢表空間的free space
selecttablespace_name,
count(*) as extends,
round(sum(bytes) /1024 / 1024, 2) as mb,
sum(blocks) as blocks
from dba_free_space
group bytablespace_name;
--查詢表空間的總容量
select tablespace_name,sum(bytes) / 1024 / 1024 as mb
from dba_data_files
group bytablespace_name;
--查詢表空間使用率
selecttotal.tablespace_name,
round(total.mb, 2) astotal_mb,
round(total.mb -free.mb, 2) as used_mb,
round((1 - free.mb /total.mb) * 100, 2) || '%' as used_pct
from (selecttablespace_name, sum(bytes) / 1024 / 1024 as mb
from dba_free_space
group bytablespace_name) free,
(selecttablespace_name, sum(bytes) / 1024 / 1024 as mb
from dba_data_files
group bytablespace_name) total
wherefree.tablespace_name = total.tablespace_name;
selectupper(f.tablespace_name) "表空間名",
d.tot_grootte_mb"表空間大小(m)",
d.tot_grootte_mb- f.total_bytes "已使用空間(m)",
to_char(round((d.tot_grootte_mb- f.total_bytes) /
d.tot_grootte_mb * 100,
2),'990.99') "使用比",
f.total_bytes"空閒空間(m)",
f.max_bytes"最大塊(m)" from (selecttablespace_name,
round(sum(bytes)/
(1024 * 1024),
2) total_bytes,
round(max(bytes) /
(1024 * 1024),
2) max_bytes fromsys.dba_free_space groupbytablespace_name) f,
(selectdd.tablespace_name,
round(sum(dd.bytes)/ (1024 * 1024), 2) tot_grootte_mb fromsys.dba_data_files dd groupbydd.tablespace_name) d where d.tablespace_name =f.tablespace_name orderby4desc
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