1. Find the components and occupying space
select occupant_name.schema_name,space_usage_kbytes/1024 size_MB from v$sysaux_occupants order by 3 desc;
2. Find from when the statistics data is stored:
select dbms_stats.get_stats_history_availability from dual;
3. What is configured to keep the stats retention
select dbms_stats.get_stats_retention from dual;
4. Cleanup some history days
begin
for i in reverse 10..100
loop
dbms_stats.purge_stats(sysdate-1);
end loop;
end;
/
5. Purge All
exec dbms_stats.purge_stats(dbms_stats.purge_all);
6. Appendix
6.1 prediction of the space needed
$ORACLE_HOME\rdbms\admin\utlsyxsz.sql
6.2 Apporximate growth of the tables
$ORACLE_HOME\rdbms\admin\awrinfo.sql