How to release space of SYSAUX tablespace

Question

Hi,
I am now using htmldb 2.0 and created tens of tables in one schema. Several tables are stored in tablespace SYSAUX. Since now I am trying to store a big file to the table(1GB), I found the tablespace grows pretty fast and I have to extend the size. The odd thing is when I delete that file from my table, SYSAUX tablespace seems not release any room and when I insert the big file again into the table, SYSAUX grows again. How can I release the space then? I can't image that why it can't release any room. I also check the occupants of SYSAUX and found one occupant called "other" takes over 90% of space. I tried to move it out of SYSAUX, it doesn't work. What do "other" do actually? I got completely lost. Any help will be greatly appreciated.
Linke

Answer 1

Hi,
if you drop a table in Oracle 10g,
you will find teh extents of this table in
DBA_FREE_SPACE.
in DBA_FREE_SPACE???
I don't think so.
SQL >select ddf.tablespace_name,round(total/1024/1024,3) ttlSize,round((total-nvl(freespace,0))/1024/1024,3) used, round((total-nvl(freespace,0))/total*100,2) usedpct
from
(select tablespace_name,sum(bytes) total from dba_data_files group by tablespace_name) ddf,
(select tablespace_name,sum(bytes) freespace from dba_free_space group by tablespace_name) dfs
where ddf.tablespace_name=dfs.tablespace_name(+) and ddf.tablespace_name='USERS'; 
TABLESPACE_NAME                   TTLSIZE       USED    USEDPCT
USERS                                  16      2.813 17.58
SQL >create table test (col1 number) storage(initial 2m)
  2  /
Table created.
SQL >select ddf.tablespace_name,round(total/1024/1024,3) ttlSize,round((total-nvl(freespace,0))/1024/1024,3) used, round((total-nvl(freespace,0))/total*100,2) usedpct
from
(select tablespace_name,sum(bytes) total from dba_data_files group by tablespace_name) ddf,
(select tablespace_name,sum(bytes) freespace from dba_free_space group by tablespace_name) dfs
where ddf.tablespace_name=dfs.tablespace_name(+) and ddf.tablespace_name='USERS'; 
TABLESPACE_NAME                   TTLSIZE       USED    USEDPCT
USERS                                  16      4.813 30.08<--used 2mb
SQL >select sum(bytes)/1024/1024 from dba_segments where tablespace_name='USERS'
  2  /
SUM(BYTES)/1024/1024
                6.75
SQL >drop table test
  2  /
Table dropped.
SQL >select sum(bytes)/1024/1024 from dba_segments where tablespace_name='USERS'
  2  /
SUM(BYTES)/1024/1024
                6.75 <-- kept in the same tablespace