system表空间满的处理-SYS_LOB0003450292C00039$$

      今天同事发现一个库的system表空间快满了，正好没事，登录上去也分析一下。

$ sqlplus '/ as sysdba'

SQL*Plus: Release 10.2.0.2.0 - Production on Wed Apr 13 09:57:25 2011

Copyright (c) 1982, 2005, Oracle.  All Rights Reserved.

sys@CQTMSZTF_SQL> col TABLESPACE_NAME for a30                                                                                                           

sys@CQTMSZTF_SQL> col FREE_PCT for a20                                                                                                                 

sys@CQTMSZTF_SQL> set heading on                                                                                                                       

sys@CQTMSZTF_SQL> SELECT df.TABLESPACE_NAME,FILES, extent_management ,sum_m as TOTAL_SIZE,                               

  2  nvl(sum_free_m,0) as FREE_MB,to_char(100*nvl(sum_free_m,0.1)/sum_m, '999.99') AS FREE_PCT                          

  3  FROM ( SELECT tablespace_name,count(file_id) as files ,sum(bytes)/1024/1024 AS sum_m FROM dba_data_files GROUP BY tablespace_name) df,

  4  (SELECT tablespace_name,                                                                              

  5  sum(bytes)/1024/1024 AS sum_free_m                                                                        

  6  FROM dba_free_space GROUP BY tablespace_name ) fs,(select tablespace_name,extent_management from dba_tablespaces) ts                 

  7  where df.tablespace_name=fs.tablespace_name(+) and df.tablespace_name=ts.tablespace_name order by FREE_PCT;  

TABLESPACE_NAME                     FILES EXTENT_MAN TOTAL_SIZE    FREE_MB FREE_PCT

------------------------------ ---------- ---------- ---------- ---------- --------------------

SYSTEM                                  2 LOCAL            5590    23.1875     .41

TMS2006                                 6 LOCAL           24000  5798.8125   24.16

USERS                                   1 LOCAL               5          2   40.00

EXAMPLE                                 1 LOCAL             150    72.3125   48.21

HR                                      3 LOCAL            9020  5822.0625   64.55

UNDOTBS1                                1 LOCAL            5000  3998.1875   79.96

SYSAUX                                  2 LOCAL            4630     3924.5   84.76

CQWEB                                   2 LOCAL            5000  4998.1875   99.96

果然，system表空间已经占用了5个G了。看下top10对象有哪些

col owner for a10

SELECT *

  FROM (SELECT   BYTES, segment_name, segment_type, owner

            FROM dba_segments

           WHERE tablespace_name = 'SYSTEM'

        ORDER BY BYTES DESC)

 WHERE ROWNUM < 10

/

     BYTES SEGMENT_NAME              SEGMENT_TYPE       OWNER

---------- ------------------------- ------------------ ----------

1811939328 SYS_LOB0003450292C00039$$ LOBSEGMENT         SYSTEM

1143996416 C_OBJ#_INTCOL#            CLUSTER            SYS

 465567744 I_COL1                    INDEX              SYS

 411041792 C_OBJ#                    CLUSTER            SYS

 226492416 I_COL2                    INDEX              SYS

 218103808 I_COL3                    INDEX              SYS

 209715200 HIST_HEAD$                TABLE              SYS

 183500800 IDL_UB1$                  TABLE              SYS

 117440512 I_H_OBJ#_COL#             INDEX              SYS

简单看下，就知道前面两个肯定不对劲，先处理最大的一个吧。

select * from dba_lobs where SEGMENT_NAME='SYS_LOB0003450292C00039$$';

 

OWNER      TABLE_NAME

---------- ------------------------------

COLUMN_NAME

----------------------------------------------------------------------------------------------------

SEGMENT_NAME                   TABLESPACE_NAME      INDEX_NAME                          CHUNK

------------------------------ -------------------- ------------------------------ ----------

PCTVERSION  RETENTION  FREEPOOLS CACHE      LOGGING IN_ FORMAT          PAR

---------- ---------- ---------- ---------- ------- --- --------------- ---

SYSTEM     SYS_EXPORT_FULL_02

XML_CLOB

SYS_LOB0003450292C00039$$      SYSTEM               SYS_IL0003450292C00039$$             8192

                  900            NO         YES     YES ENDIAN NEUTRAL  NO

 

从查询结果可知这个clob字段是属于SYS_EXPORT_FULL_02这张表的。检查记录数，嗯，倒是挺多

sys@CQTMSZTF_SQL> select count(*) from system.SYS_EXPORT_FULL_02;

 

  COUNT(*)

----------

    146442

在网上查了下，资料很少，只是使用数据泵导入导出的时候会出现这个名字，而且显示的是scheduler。关于数据泵的知识在头脑里闪现了一下，疑惑的登录试试：

expdp attach='SYS_EXPORT_FULL_02'

 

Export: Release 10.2.0.2.0 - 64bit Production on Wednesday, 13 April, 2011 11:08:40

 

Copyright (c) 2003, 2005, Oracle.  All rights reserved.

 

Username: system

Password:

 

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

 

Job: SYS_EXPORT_FULL_02

  Owner: SYSTEM                        

  Operation: EXPORT                        

  Creator Privs: FALSE                         

  GUID: 9F8764FC3DF3C0D6E0437F000001C0D6

  Start Time: Wednesday, 13 April, 2011 11:08:54

  Mode: FULL                          

  Instance: cqtmsztf

  Max Parallelism: 1

  EXPORT Job Parameters:

  Parameter Name      Parameter Value:

     CLIENT_COMMAND        system/********@CQTMSZTF full=y dumpfile=a.dmp

  State: IDLING                        

  Bytes Processed: 0

  Current Parallelism: 1

  Job Error Count: 0

  Dump File: /oracle/app/oracle/product/10.2/admin/cqtmsztf/dpdump/a.dmp

    bytes written: 487,424

 

Worker 1 Status:

  State: UNDEFINED                     

  Object Schema: HRZTF0317

  Object Name: RPTDESDATA_1465

  Object Type: DATABASE_EXPORT/SCHEMA/TABLE/TABLE

  Completed Objects: 58,631

  Worker Parallelism: 1

Export> stop_job

Are you sure you wish to stop this job ([yes]/no): yes

尝试停止job后，再查询空间占用情况

sys@CQTMSZTF_SQL> SELECT *

  2    FROM (SELECT   BYTES, segment_name, segment_type, owner

  3              FROM dba_segments

  4             WHERE tablespace_name = 'SYSTEM'

  5          ORDER BY BYTES DESC)

  6   WHERE ROWNUM < 10

  7  ;

     BYTES SEGMENT_NAME              SEGMENT_TYPE       OWNER

---------- ------------------------- ------------------ ----------

1811939328 SYS_LOB0003450292C00039$$ LOBSEGMENT         SYSTEM

1143996416 C_OBJ#_INTCOL#            CLUSTER            SYS

 465567744 I_COL1                    INDEX              SYS

 411041792 C_OBJ#                    CLUSTER            SYS

 226492416 I_COL2                    INDEX              SYS

 218103808 I_COL3                    INDEX              SYS

 209715200 HIST_HEAD$                TABLE              SYS

 183500800 IDL_UB1$                  TABLE              SYS

 117440512 I_H_OBJ#_COL#             INDEX              SYS

还是存在，下面尝试kill_job

$ expdp attach='SYS_EXPORT_FULL_02'

 

Export: Release 10.2.0.2.0 - 64bit Production on Wednesday, 13 April, 2011 11:12:56

 

Copyright (c) 2003, 2005, Oracle.  All rights reserved.

 

Username: system

Password:

 

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production

With the Partitioning, OLAP and Data Mining options

 

Job: SYS_EXPORT_FULL_02

  Owner: SYSTEM                        

  Operation: EXPORT                        

  Creator Privs: FALSE                         

  GUID: 9F8764FC3DF3C0D6E0437F000001C0D6

  Start Time: Wednesday, 13 April, 2011 11:13:02

  Mode: FULL                          

  Instance: cqtmsztf

  Max Parallelism: 1

  EXPORT Job Parameters:

  Parameter Name      Parameter Value:

     CLIENT_COMMAND        system/********@CQTMSZTF full=y dumpfile=a.dmp

  State: IDLING                        

  Bytes Processed: 0

  Current Parallelism: 1

  Job Error Count: 0

  Dump File: /oracle/app/oracle/product/10.2/admin/cqtmsztf/dpdump/a.dmp

    bytes written: 487,424

 

Worker 1 Status:

  State: UNDEFINED                     

  Object Schema: HRZTF0317

  Object Name: RPTDESDATA_1465

  Object Type: DATABASE_EXPORT/SCHEMA/TABLE/TABLE

  Completed Objects: 58,631

  Worker Parallelism: 1

 

Export> kill_job

Are you sure you wish to stop this job ([yes]/no): yes

 

 

sys@CQTMSZTF_SQL> SELECT *

  2    FROM (SELECT   BYTES, segment_name, segment_type, owner

  3              FROM dba_segments

  4             WHERE tablespace_name = 'SYSTEM'

  5          ORDER BY BYTES DESC)

  6   WHERE ROWNUM < 10

  7  ;

 

     BYTES SEGMENT_NAME              SEGMENT_TYPE       OWNER

---------- ------------------------- ------------------ ----------

1143996416 C_OBJ#_INTCOL#            CLUSTER            SYS

 465567744 I_COL1                    INDEX              SYS

 411041792 C_OBJ#                    CLUSTER            SYS

 226492416 I_COL2                    INDEX              SYS

 218103808 I_COL3                    INDEX              SYS

 209715200 HIST_HEAD$                TABLE              SYS

 183500800 IDL_UB1$                  TABLE              SYS

 117440512 I_H_OBJ#_COL#             INDEX              SYS

 109051904 I_HH_OBJ#_COL#            INDEX              SYS

惊喜的发现那个segment已经不见了，果然和我想的一样。

再看C_OBJ#_INTCOL#这个对象是cluster，它占的空间也比较大，但这时我的system表空间已经free2个多G了，由于C_OBJ#_INTCOL#这张表是系统的核心表，所以决定不管它了，懒得去动它，麻烦。关于这张表的清理，请参看一下链接。

使用EVENT 38003来重建BOOTSTRAP$对象 

 

下面是网友的解答，我整理如下：

expdp/impd 是Job形式的，会调用DBMS_DATAPUMP PL/SQL包，这个API提供高速的导出导入功能；还有DBMS_METADATA PL/SQL包，这个包是将metadata（对象定义）存储在XML里。
     所有的进程都能load 和unload 这些metadata。  在备份期间，会自动的生成一张与Job_name 相同名称的表， 该表在备份期间保存metadata数据。 当备份结束后，自动删除该表。

     可以使用SQL：
              SQL>select *  FROM dba_datapump_jobs

       查看Job 的信息。 如果意外情况导致备份Job失败，那么对应保存metadata的表，还是会存在。 这个时候，如果查询dba_datapump_jobs，会显示该Job为not running。 这时候，我们只需要drop 掉对应的表，在查询dba_datapump_jobs。 就没有记录了。 这个也是一种处理方法。


       如果没有指定Job name。 所以系统自动生成了一个：SYS_EXPORT_FULL_02。
       默认是从SYS_EXPORT_FULL_01开始，因为我之前有一个没有运行的Job，所以这里从2开始了。

 

 

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