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废话不多说了，具体代码如下所示：
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--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 hh24: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 hh24: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 hh24:mi:ss') as timestamp)
and cast(to_date('2014-03-11 00:00:00', 'yyyy-mm-dd hh24: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 hh24:mi:ss') as timestamp)
and cast(to_date('2014-03-11 00:00:00', 'yyyy-mm-dd hh24: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 hh24: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 hh24: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 hh24:mi:ss') as timestamp)
and cast(to_date('2016-12-11 00:00:00', 'yyyy-mm-dd hh24: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 hh24:mi:ss') as timestamp)
and cast(to_date('2016-12-11 00:00:00', 'yyyy-mm-dd hh24: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$;
总结
以上所述是小编给大家介绍的system表空间不足的报警，希望对大家有所帮助
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