在本地的测试库中，本来空间就不足，结果创建了一个表有600多万条记录，想创建一个index. 物理段有340多M.
临时段大小有100M,结果想创建一个索引，总是报临时表空间不足的错误。
[ora11g@rac1 test]$ ksh test.sh "create unique index t_pk on t(object_id) tablespace pool_data nologging online;"
create unique index t_pk on t(object_id) tablespace pool_data nologging online
*
ERROR at line 1:
ORA-01652: unable to extend temp segment by 128 in tablespace TEMPTS1
排除了索引所在的表空间不足的问题，实时监控了一下，发现确实临时表空间使用率在瞬间飙到100%，然后就报了ORA-01652的错误。
Oracle index 和null 研究
online rebulid index 异常终止遇到ORA-08104
在尝试各种方法之后，先扩大临时段再次尝试。
alter database tempfile '/u03/ora11g/oradata/TEST01/temp01.dbf' resize 200M；
结果再次尝试的时候，就有了如下的错误。
create unique index t_pk on t(object_id) tablespace pool_data nologging online
*
ERROR at line 1:
ORA-00603: ORACLE server session terminated by fatal error
ORA-01114: IO error writing block to file (block # )
ORA-01114: IO error writing block to file 201 (block # 15439)
ORA-27072: File I/O error
Additional information: 4
Additional information: 15439
Additional information: 4096
Process ID: 5683
Session ID: 18 Serial number: 103
Elapsed: 00:00:21.11
ERROR:
ORA-03114: not connected to ORACLE
一看就有些崩溃了，以为数据库又挂了。一看进程，还在，还能连接。
[ora11g@rac1 dbm_lite]$ ps -ef|grep smon
ora11g 2357 1 0 05:32 ? 00:00:01 ora_smon_TEST01
ora11g 5746 5327 0 06:27 pts/0 00:00:00 grep smon
查看alert日志。
Fri Jun 06 06:26:14 2014
alter database tempfile '/u03/ora11g/oradata/TEST01/temp01.dbf' resize 200M
Completed: alter database tempfile '/u03/ora11g/oradata/TEST01/temp01.dbf' resize 200M
Fri Jun 06 06:26:39 2014
online index (re)build cleanup: objn=15331 maxretry=2000 forever=0
Fri Jun 06 06:26:57 2014
Non critical error OR
那就再次尝试创建，结果错误接二连三。
再次创建，提示索引已经存在了。
create unique index t_pk on t(object_id) tablespace pool_data nologging
*
ERROR at line 1:
ORA-00955: name is already used by an existing object
那我删除重建呢。
drop index t_pk
*
ERROR at line 1:
ORA-08104: this index object 15334 is being online built or rebuilt
试试force选项。
drop index t_pk force
*
ERROR at line 1:
ORA-29862: cannot specify FORCE option for dropping non-domain index
查看Index的状态，显示是valid
********** INDEX DETAILS INFO *****************
INDEX_NAME TABLESPACE INDEX_TYPE UNIQUENES PAR COLUMN_LIST TABLE_TYPE STATUS NUM_ROWS LAST_ANAL G
------------------------------ ---------- ---------- --------- --- ------------------------------ ---------- ------ ---------- --------- -
T_PK POOL_DATA NORMAL UNIQUE NO OBJECT_ID TABLE VALID N
TABLE_NAME INDEX_NAME CLUSTERING_FACTOR BLOCKS NUM_ROWS
------------------------------ ------------------------------ ----------------- ---------- ----------
T T_PK 39174 6856704
那我再次rebuild 可以吗？
alter index t_pk rebuild parallel 4
*
ERROR at line 1:
ORA-08104: this index object 15334 is being online built or rebuilt