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丸趣 TV 小编给大家分享一下如何解决 System 表空间不足的报警问题，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
具体代码如下所示：
--SYSTEM 表空间不足的报警
登录之后，查询，发现是 sys.aud$ 占的地方太多。
SQL select owner, segment_name, segment_type, sum(bytes)/1024/1024 space_m
from dba_segments
where tablespace_name = SYSTEM
group by owner, segment_name, segment_type
having sum(bytes)/1024/1024 = 20
order by space_m desc
;
4 5 6 7
OWNER SEGMENT_NAME SEGMENT_TYPE SPACE_M
-------- ------------------------------- -------
SYS AUD$ TABLE 4480
SYS IDL_UB1$ TABLE 272
SYS SOURCE$ TABLE 72
SYS IDL_UB2$ TABLE 32
SYS C_OBJ#_INTCOL# CLUSTER 27
SYS C_TOID_VERSION# CLUSTER 24
6 rows selected.
SQL
查看是哪个记得比较多。
col userhost format a30
select userid, userhost, count(1) from sys.aud$
where ntimestamp# =CAST(to_date( 2014-03-01 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
group by userid, userhost
having count(1) 500
order by count(1) desc
;
再继续找哪天比较多。
select to_char(ntimestamp#, YYYY-MM-DD) audit_date, count(1)
from sys.aud$
where ntimestamp# =CAST(to_date( 2014-03-01 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = xxxx and userhost = xxxx
group by to_char(ntimestamp#, YYYY-MM-DD)
order by count(1) desc
;
select spare1, count(1) from sys.aud$
where ntimestamp# between CAST(to_date( 2014-03-10 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and CAST(to_date( 2014-03-11 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = xxxx and userhost = xxxx
group by spare1
;
select action#, count(1) from sys.aud$
where ntimestamp# between CAST(to_date( 2014-03-10 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and CAST(to_date( 2014-03-11 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = xxxx and userhost = xxxx
and spare1 = xxxx
group by action#
order by count(1) desc
;
结果如下：
ACTION# COUNT(1)
---------- ----------
101 124043
100 124043
SQL
其实是上次打开的 audit 一直没有关闭。
关闭：
SQL noaudit session;
清空：
truncate table sys.aud$;
------------------------------------------------------------------------
实战
------------------------------------------------------------------------
--1, 查询表空间占用情况
select dbf.tablespace_name as tablespace_name,
dbf.totalspace as totalspace,
dbf.totalblocks as totalblocks,
dfs.freespace freespace,
dfs.freeblocks freeblocks,
(dfs.freespace / dbf.totalspace) * 100 as freeRate
from (select t.tablespace_name,
sum(t.bytes) / 1024 / 1024 totalspace,
sum(t.blocks) totalblocks
from DBA_DATA_FILES t
group by t.tablespace_name) dbf,
(select tt.tablespace_name,
sum(tt.bytes) / 1024 / 1024 freespace,
sum(tt.blocks) freeblocks
from DBA_FREE_SPACE tt
group by tt.tablespace_name) dfs
where trim(dbf.tablespace_name) = trim(dfs.tablespace_name)
--2, 查看哪里占的比较多 SYSTEM 为 step1 中查询 tablespace_name 内容
select owner, segment_name, segment_type, sum(bytes)/1024/1024 space_m
from dba_segments
where tablespace_name = SYSTEM
group by owner, segment_name, segment_type
having sum(bytes)/1024/1024 = 20
order by space_m desc
--3, 查看是哪个记得比较多 count(1) 越大, 说明占得比较多
select userid, userhost, count(1) from sys.aud$
where ntimestamp# =CAST(to_date( 2014-03-01 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
group by userid, userhost
having count(1) 500
order by count(1) desc
--4, 再继续找哪天比较多 userid userhost 为上一步查询内容
select to_char(ntimestamp#, YYYY-MM-DD) audit_date, count(1)
from sys.aud$
where ntimestamp# =CAST(to_date( 2015-03-01 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = userid and userhost = userhost
group by to_char(ntimestamp#, YYYY-MM-DD)
order by count(1) desc
;
select spare1, count(1) from sys.aud$
where ntimestamp# between CAST(to_date( 2016-03-10 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and CAST(to_date( 2016-12-11 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = userid and userhost = userhost
group by spare1
;
--spare1 为上一步查询内容
select action#, count(1) from sys.aud$
where ntimestamp# between CAST(to_date( 2016-03-10 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and CAST(to_date( 2016-12-11 00:00:00 , YYYY-MM-DD hh34:mi:ss) AS TIMESTAMP)
and userid = userid and userhost = userhost
and spare1 = Administrator
group by action#
order by count(1) desc
--5, 关闭 seeion
noaudit session;
--6, 清空：
truncate table sys.aud$;以上是“如何解决 System 表空间不足的报警问题”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注丸趣 TV 行业资讯频道！
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