System表空间不足的报警问题浅析

废话不多说了，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 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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！