一、oracle数据库因系统表空间满无法登陆，提示如下：
ORA-00604: error occurred at recursive SQL level 1ORA-01653: unable to extend table SYSTEMAUD$ by8192 in tablespace SYSTEMORA-02002: error while writing to audit trailORA-00604: error occurred at recursive SQL level 1ORA-01653: unable to extend table SYSTEMAUD$ by8192 in tablespace SYSTEM
如今使用sysdba登陆plsql实行2到6的步调即可
二、查察SYSAUX和SYSTEM系统表空间使用率巨细
SELECT *
FROM (SELECT 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(+)
UNION ALL
SELECT D.TABLESPACE_NAME,
SPACE || 'M' "SUM_SPACE(M)",
BLOCKS SUM_BLOCKS,
USED_SPACE || 'M' "USED_SPACE(M)",
ROUND(NVL(USED_SPACE, 0) / SPACE * 100, 2) || '%' "USED_RATE(%)",
NVL(FREE_SPACE, 0) || 'M' "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$TEMP_SPACE_HEADER
GROUP BY TABLESPACE_NAME) F
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
ORDER BY 1)
WHERE TABLESPACE_NAME IN ('SYSAUX', 'SYSTEM');
三、查询SYSTEM表空间中占用空间最大的表
SELECT segment_name, segment_type, round(bytes/1024/1024, 2) AS "Size_MB"
FROM dba_segments
WHERE tablespace_name = 'SYSTEM'
ORDER BY bytes DESC;
此处截图是清空了system.aud$表数据后的截图
四、查询SYSAUX表空间中占用空间最大的表
SELECT segment_name, segment_type, round(bytes/1024/1024, 2) AS "Size_MB"
FROM dba_segments
WHERE tablespace_name = 'SYSAUX'
ORDER BY bytes DESC;
五、备份 system.aud$表的前100条数据，数据导出为SQL文件
SELECT * FROM system.aud$ WHERE ROWNUM <= 100;
六、清空system.aud$表中的登陆日志
TRUNCATE TABLE system.aud$;
一般清空登陆日志后会释放一些系统表空间，即可临时登陆。
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