SYSTEM tablespace AUD $ solution to excessive space usage

SYSTEM tablespace AUD $ solution to excessive space usage

Problem: The SYSTEM tablespace usage exceeds 99%. During the preliminary design, the SYSTEM tablespace is fixed to 10 GB and cannot be automatically expanded.

1. query the usage of the SYSTEM tablespace.

set linesize 200col TABLESPACE_NAME for a25col SUM_SPACE(M) for a20col USED_SPACE(M) for a20col USED_RATE(%) for a20col FREE_SPACE(M) for a20SELECT D.TABLESPACE_NAME,       SPACE || 'M' "SUM_SPACE(M)",       BLOCKS "SUM_BLOCKS",       SPACE - NVL (FREE_SPACE, 0) || 'M' "USED_SPACE(M)",       ROUND ( (1 - NVL (FREE_SPACE, 0) / SPACE) * 100, 2) || '%'          "USED_RATE(%)",       FREE_SPACE || 'M' "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(+)  AND D.TABLESPACE_NAME = 'SYSTEM';

2. query the space occupied by each segment in the SYSTEM tablespace.

SELECT OWNER, SEGMENT_NAME, SEGMENT_TYPE, SUM(BYTES)/1024/1024  FROM DBA_SEGMENTS WHERE TABLESPACE_NAME = 'SYSTEM' GROUP BY OWNER, SEGMENT_NAME, SEGMENT_TYPE ORDER BY 4;

3. truncate the AUD $ table with the largest occupied space (the operation must be confirmed with the DBA)

truncate table AUD$;

4. query the tablespace of the AUD $ table

 SELECT OWNER, TABLE_NAME, TABLESPACE_NAME    FROM DBA_TABLES     WHERE TABLE_NAME = 'AUD$'     AND OWNER = 'SYS';  

5. Change the tablespace of the AUD $ table to another tablespace (selected)

BEGIN   DBMS_AUDIT_MGMT.SET_AUDIT_TRAIL_LOCATION(    AUDIT_TRAIL_TYPE => DBMS_AUDIT_MGMT.AUDIT_TRAIL_AUD_STD,     AUDIT_TRAIL_LOCATION_VALUE => '&AUD_TBS_NAME');  END;  /