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TEMP表空间爆满处理一例

2011-07-15 11:31 239 查看

 今早巡检数据库发现如下报错：

Fri Jul 15 06:03:03 2011

ORA-1652: unable to extend temp segment by 128 in tablespace                 TEMP

……

Fri Jul 15 08:02:59 2011

ORA-1652: unable to extend temp segment by 128 in tablespace                 TEMP


通过查看表空间发现，TEMP表空间被扩展到了32G，而原先设置的只有4G，我们通过如下语句分析TEMP表空间有什么东西这么耗空间：

      SELECT se.username,sid,serial#,sql_address,machine, program,tablespace,segtype,contents
      FROM v$session se,v$sort_usage su
      WHERE se.saddr=su.session_addr
      Order By machine

 

查询结果如下：

USERNAME

SID

SERIAL#

SQL_ADDRESS

MACHINE

PROGRAM

TABLESPACE

SEGTYPE

CONTENTS

PHC

831

307

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

897

10837

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

928

62946

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

893

59116

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

1081

30775

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

1025

24989

00

PORT-web

　

TEMP

LOB_DATA

TEMPORARY

PHC

907

10378

00

WORKGROUP\PORT-SJJH2

PLSQLDev.exe

TEMP

LOB_DATA

TEMPORARY

EPORT_ADMIN

1080

63733

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

923

43188

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

1047

23

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

929

29713

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

816

44578

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

910

20498

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

969

50313

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

915

57

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

876

7930

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

906

40178

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

836

26868

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

EPORT_ADMIN

912

50385

000000025B61AF28

WORKGROUP\TEST-WZTJFZ

logread.exe

TEMP

SORT

TEMPORARY

 仔细看如下查询结果，EPORT_ADMIN是以前很少见到的，怀疑logread.exe存在嫌疑，考虑到这只是个数据同步进程，考虑如下命令KILL掉：

Alter system kill session '1080,63733';

Alter system kill session '923,43188';

Alter system kill session '1047,23';

Alter system kill session '929,29713';

Alter system kill session '816,44578';

Alter system kill session '910,20498';

Alter system kill session '969,50313';

Alter system kill session '915,57';

Alter system kill session '876,7930';

Alter system kill session '906,40178';

Alter system kill session '836,26868';

Alter system kill session '912,50385';

 

 

语句执行后EPORT_ADMIN的进程在TEMP表空间消失，再来看TEMP表空间，已经基本清空：

Name

Size (MB)

Used (MB)

Used (%)

Free (MB)

Status

Datafiles

Type

TEMP

32,767.00

47

0.1

32,720.00

　

1

TEMPORARY


结论：显然EPORT_ADMIN下的logread.exe存在大量表空间的开销，这在业务高峰期是非常危险的现象。

 

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