SYSTEM表空间不足的报警

--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$;