欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

System表空间不足的报警问题浅析

程序员文章站 2022-06-23 21:27:29
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...

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