清理 SYSAUX 表空间

Posted 2020-11-07

1、查看sysaux空间使用率
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‘,‘UNDOTBS1‘,‘TEMP‘);

2、查看sysaux_occupants情况
SELECT occupant_name "Item",
space_usage_kbytes / 1048576 "Space Used (GB)",
schema_name "Schema",
move_procedure "Move Procedure"
FROM v$sysaux_occupants
ORDER BY 1;

3、查看表空间段使用情况
select * from (
select segment_name,segment_type,bytes / 1024 / 1024
from dba_segments
where tablespace_name = ‘SYSAUX‘
and bytes / 1024 / 1024 >100
order by bytes desc);

4、生成删除段内容语句
select distinct ‘truncate table ‘||segment_name||‘;‘,s.bytes/1024/1024
from dba_segments s
where s.segment_name like ‘WRH$%‘
and segment_type in (‘TABLE PARTITION‘, ‘TABLE‘)
and s.bytes/1024/1024>100
order by s.bytes/1024/1024/1024 desc;

5、删除记录
truncate table WRH$_ACTIVE_SESSION_HISTORY;
truncate table WRH$_EVENT_HISTOGRAM;
truncate table WRH$_LATCH;
truncate table WRH$_SQLSTAT;
truncate table WRH$_SYSSTAT;
truncate table WRH$_PARAMETER;
truncate table WRH$_SQL_PLAN;
truncate table WRH$_LATCH_MISSES_SUMMARY;
truncate table WRH$_SEG_STAT;
truncate table WRH$_SYSTEM_EVENT;

6、重新查看表空间使用率

参考博文：
http://blog.51cto.com/ylw6006/1135593
https://blog.csdn.net/stevendbaguo/article/details/53745661