Email: service@parnassusdata.com 7 x 24 online support!
Oracle ORA-00704 ORA-00604 ORA-01502 SYS.I_DEPENDENCY1.+損害あるいは使えなくなった
ORACLEデータベース によくあるエラ の解決策
プロのOracle Databaseの復旧サービスを提供
携帯番号: +86 13764045638 メール:service@parnassusdata.com
ORA-00704 ORA-00604 ORA-01502: index ‘SYS.I_DEPENDENCY1′ or partition of such index is in unusable stateエラはどうやって対応できるかと友に聞かれた。
11.2でI_DEPENDENCY1損害の対応
I_DEPENDENCY2損害の対応f
SYS.I_DEPENDENCY1が壊されたあるいは使えなくなったときに、以下のようなエラになる:
Mon Dec 22 09:13:32 2014
Errors in file /home/oracle/oracle/product/admin/orcl/udump/orcl_ora_19783_lunar.trc: ORA-00704: bootstrap process failure ORA-00604: error occurred at recursive SQL level 1 ORA-01502: index ‘SYS.I_DEPENDENCY1’ or partition of such index is in unusable state |
まずは10gでの対応策で、二つがある:
1,10gで直にリカバリする
2,11.2でデータベースをアップグレードモードに調整して、リカバリする
まずはデータベースに依頼関係があるテーブルは何があるかを見てみよう:
[oracle@lunar oracle]$ ss
SQL*Plus: Release 10.2.0.1.0 – Production on Mon Dec 22 08:10:07 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production With the Partitioning, OLAP and Data Mining options
SYS@lunar>select owner,object_id,object_name,object_type from dba_objects where object_name like ‘%DEPENDENCY%’ and owner=’SYS’;
OWNER OBJECT_ID OBJECT_NAME OBJECT_TYPE ————— ———- —————————— ——————- SYS 92 DEPENDENCY$ TABLE SYS 46827 GENDEPENDENCYBLOCKSEQUENCE TYPE SYS 46828 GENDEPENDENCYBLOCKSEQUENCESEQU TYPE SYS 46824 GENDEPENDENCYBLOCKSTRUCT TYPE SYS 46826 GENDEPENDENCYBLOCKUNION TYPE SYS 46825 GENINCLUDEDDEPENDENCYBLOCKSTRU TYPE SYS 1691 GV_$OBJECT_DEPENDENCY VIEW SYS 122 I_DEPENDENCY1 INDEX SYS 123 I_DEPENDENCY2 INDEX SYS 3950 PUBLIC_DEPENDENCY VIEW SYS 47048 SQLDEPENDENCYBLOCKSEQ TYPE SYS 47049 SQLDEPENDENCYBLOCKSEQUENCE TYPE SYS 47050 SQLDEPENDENCYBLOCKSEQUENCESEQ TYPE SYS 47051 SQLDEPENDENCYBLOCKSEQUENCESEQU TYPE SYS 47045 SQLDEPENDENCYBLOCKSTRUCT TYPE SYS 47047 SQLDEPENDENCYBLOCKUNION TYPE SYS 47046 SQLINCLUDEDDEPENDENCYBLOCKSTRU TYPE SYS 1066 V_$OBJECT_DEPENDENCY VIEW
18 rows selected.
|
ここで、大切なのはDEPENDENCY$のインディクス情報である。DEPENDENCY$テーブルに二つのインディクスがあることを察知できる。
ここの二つのインディクスが壊された影響も異なっている。その意味は以下の通り:
SYS@lunar>select owner,table_name,index_name,tablespace_name,status from dba_indexes where table_name=’DEPENDENCY$’;
OWNER TABLE_NAME INDEX_NAME TABLESPACE_NAME STATUS ————— —————————— —————————— —————————— ——– SYS DEPENDENCY$ I_DEPENDENCY1 SYSTEM VALID SYS DEPENDENCY$ I_DEPENDENCY2 SYSTEM VALID
|
9i、10g、11.1の前に、一部のコアオブジェクトの定義は$ORACLE_HOME/rdbms/admin/sql.bsqにある。
例えばtab$,obj$,ind$など。
11.2から、一部の大事なコアベーステーブルを作成するスクリプトは依然としてsql.bsqであるが、いろんなオブジェクトに異なったスクリプトに分類された:
dcore.bsq
dsqlddl.bsq dmanage.bsq dplsql.bsq dtxnspc.bsq dfmap.bsq denv.bsq drac.bsq dsec.bsq doptim.bsq dobj.bsq djava.bsq dpart.bsq drep.bsq daw.bsq dsummgt.bsq dtools.bsq dexttab.bsq ddm.bsq dlmnr.bsq ddst.bsq |
dependency$,i_dependency1とi_dependency1の定義は以下の通り(10.2と11.2に相違がない):
create table dependency$ /* dependency table */
( d_obj# number not null, /* dependent object number */ d_timestamp date not null, /* dependent object specification timestamp */ order# number not null, /* order number */ p_obj# number not null, /* parent object number */ p_timestamp date not null, /* parent object specification timestamp */ d_owner# number, /* dependent owner number */ property number not null, /* 0x01 = HARD dependency */ /* 0x02 = REF dependency */ /* 0x04 = FINER GRAINED dependency */ d_attrs raw(“M_CSIZ”), /* Finer grain attr. numbers if finer grained */ d_reason raw(“M_CSIZ”)) /* Reason mask of attrs causing invalidation */ storage (initial 10k next 100k maxextents unlimited pctincrease 0) /
create unique index i_dependency1 on dependency$(d_obj#, d_timestamp, order#) storage (initial 10k next 100k maxextents unlimited pctincrease 0) /
create index i_dependency2 on dependency$(p_obj#, p_timestamp) storage (initial 10k next 100k maxextents unlimited pctincrease 0) / |
次に、どんなブロックを使ったかを探ってみよう:
SYS@lunar>select owner,segment_name,segment_type,extent_id,file_id,block_id from DBA_EXTENTS where segment_name like ‘%DEPENDENCY%’;
OWNER SEGMENT_NAME SEGMENT_TYPE EXTENT_ID FILE_ID BLOCK_ID ————— —————————— —————— ———- ———- ———- SYS DEPENDENCY$ TABLE 0 1 689 SYS DEPENDENCY$ TABLE 1 1 6329 SYS DEPENDENCY$ TABLE 2 1 6665 SYS DEPENDENCY$ TABLE 3 1 6945 SYS DEPENDENCY$ TABLE 4 1 8481 SYS DEPENDENCY$ TABLE 5 1 10505 SYS DEPENDENCY$ TABLE 6 1 12825 SYS DEPENDENCY$ TABLE 7 1 13425 SYS DEPENDENCY$ TABLE 8 1 14753 SYS DEPENDENCY$ TABLE 9 1 15513 SYS DEPENDENCY$ TABLE 10 1 17169 SYS DEPENDENCY$ TABLE 11 1 19209 SYS DEPENDENCY$ TABLE 12 1 19897 SYS DEPENDENCY$ TABLE 13 1 26689 SYS DEPENDENCY$ TABLE 14 1 28153 SYS DEPENDENCY$ TABLE 15 1 29377 SYS DEPENDENCY$ TABLE 16 1 31241 SYS DEPENDENCY$ TABLE 17 1 45321 SYS DEPENDENCY$ TABLE 18 1 51465 SYS DEPENDENCY$ TABLE 19 1 55433 SYSMAN MGMT_INV_DEPENDENCY_RULE TABLE 0 3 24009 SYSMAN MGMT_METRIC_DEPENDENCY_DEF TABLE 0 3 26193 SYSMAN MGMT_METRIC_DEPENDENCY TABLE 0 3 26209 SYSMAN MGMT_METRIC_DEPENDENCY_DETAILS TABLE 0 3 26225 SYS I_DEPENDENCY1 INDEX 0 1 929 SYS I_DEPENDENCY1 INDEX 1 1 6313 SYS I_DEPENDENCY1 INDEX 2 1 6777 SYS I_DEPENDENCY1 INDEX 3 1 8905 SYS I_DEPENDENCY1 INDEX 4 1 12185 SYS I_DEPENDENCY1 INDEX 5 1 13433 SYS I_DEPENDENCY1 INDEX 6 1 14761 SYS I_DEPENDENCY1 INDEX 7 1 15537 SYS I_DEPENDENCY1 INDEX 8 1 18425 SYS I_DEPENDENCY1 INDEX 9 1 19273 SYS I_DEPENDENCY1 INDEX 10 1 26705 SYS I_DEPENDENCY1 INDEX 11 1 28297 SYS I_DEPENDENCY1 INDEX 12 1 30609 SYS I_DEPENDENCY1 INDEX 13 1 32297 SYS I_DEPENDENCY1 INDEX 14 1 34353 SYS I_DEPENDENCY1 INDEX 15 1 37129 SYS I_DEPENDENCY1 INDEX 16 1 38665 SYS I_DEPENDENCY1 INDEX 17 1 47113 SYS I_DEPENDENCY1 INDEX 18 1 51721 SYS I_DEPENDENCY2 INDEX 0 1 937 SYS I_DEPENDENCY2 INDEX 1 1 6337 SYS I_DEPENDENCY2 INDEX 2 1 6657 SYS I_DEPENDENCY2 INDEX 3 1 6961 SYS I_DEPENDENCY2 INDEX 4 1 9545 SYS I_DEPENDENCY2 INDEX 5 1 11481 SYS I_DEPENDENCY2 INDEX 6 1 13281 SYS I_DEPENDENCY2 INDEX 7 1 14369 SYS I_DEPENDENCY2 INDEX 8 1 14841 SYS I_DEPENDENCY2 INDEX 9 1 16617 SYS I_DEPENDENCY2 INDEX 10 1 18409 SYS I_DEPENDENCY2 INDEX 11 1 19889 SYS I_DEPENDENCY2 INDEX 12 1 26681 SYS I_DEPENDENCY2 INDEX 13 1 28129 SYS I_DEPENDENCY2 INDEX 14 1 29369 SYS I_DEPENDENCY2 INDEX 15 1 30649 SYS I_DEPENDENCY2 INDEX 16 1 32137 SYS I_DEPENDENCY2 INDEX 17 1 45449 SYS I_DEPENDENCY2 INDEX 18 1 51593 SYS I_DEPENDENCY2 INDEX 19 1 59785 SYSMAN PK_MGMT_METRIC_DEPENDENCY_DEF INDEX 0 3 26201 SYSMAN PK_MGMT_METRIC_DEPENDENCY INDEX 0 3 26217
65 rows selected.
|
では10.2でi_dependency1が失効になった場合をシミュレーションする(テスト環境は10.2.0.1):
[oracle@lunar oracle]$ ss
SQL*Plus: Release 10.2.0.1.0 – Production on Mon Dec 22 08:10:07 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production With the Partitioning, OLAP and Data Mining options
SYS@lunar>alter index i_dependency1 unusable;
Index altered.
SYS@lunar>select owner,table_name,index_name,tablespace_name,status from dba_indexes where table_name=’DEPENDENCY$’;
OWNER TABLE_NAME INDEX_NAME TABLESPACE_NAME STATUS ————— —————————— —————————— —————————— ——– SYS DEPENDENCY$ I_DEPENDENCY1 SYSTEM UNUSABLE SYS DEPENDENCY$ I_DEPENDENCY2 SYSTEM VALID
SYS@lunar>select obj#,flags,to_char(flags,’xxxxxxxxxxxxx’) from ind$ where obj# in (92,122,123);
OBJ# FLAGS TO_CHAR(FLAGS, ———- ———- ————– 122 2051 803 —— 2000+10+40+1=====>/* unusable (dls) : 0x01 ,这里也可以看出来被为unusable了 123 2050 802
|
alter index i_dependency1 unusableを実行して、alert.logの情報は以下の通り:
Mon Dec 22 09:08:37 2014
Index SYS.I_DEPENDENCY1 or some [sub]partitions of the index have been marked unusable
[oracle@lunar bdump]$ date Mon Dec 22 09:11:29 CST 2014 [oracle@lunar bdump]$ |
ind$のflagsフィールドの定義(その定義がベーステーブル定義を検索できる。10.2でsql.bsq,11.1の後dcore.bsq):
flags number not null,
/* mutable flags: anything permanent should go into property */ /* unusable (dls) : 0x01 */ /* analyzed : 0x02 */ /* no logging : 0x04 */ /* index is currently being built : 0x08 */ /* index creation was incomplete : 0x10 */ /* key compression enabled : 0x20 */ /* user-specified stats : 0x40 */ /* secondary index on IOT : 0x80 */ /* index is being online built : 0x100 */ /* index is being online rebuilt : 0x200 */ /* index is disabled : 0x400 */ ———注意这里,设置一个index失效的标示(转换成10进制是1024) /* global stats : 0x800 */ /* fake index(internal) : 0x1000 */ /* index on UROWID column(s) : 0x2000 */ /* index with large key : 0x4000 */ /* move partitioned rows in base table : 0x8000 */ /* index usage monitoring enabled : 0x10000 */ /* 4 bits reserved for bitmap index version : 0x1E0000 */ /* Delayed Segment Creation: 0x4000000 */ |
以上の結果によって、実際にind$.flagsに対する定義が変わっていないが、内部操作が変更されただけ。
このマークもつかえる。例えばorcacle 9204にSYSのXXXインディクスbugによって、データベースが起動できなくなる場合に、このマークでリカバリできる。
例えば、10g前に、onlineでインディクスを作成したら、中止するにはとってもめんどくさくなるので、この場合にも利用できる。
10.2のあとdbms_repair.online_index_cleanでインディクス状態をクリンアップできるが、その機能は10.2の公式ファイルに記されていない。(desc dbms_repairなら、その機能を見られる)。
Oracleはこれについての説明は以下の通りBug 3965042 : NEW FUNCTION DBMS_REPAIR.ONLINE_INDEX_CLEAN NEEDS TO BE DOCUMENTED)
ALTER TABLE MOVE ONLINE一个IOTテーブルにも似たようなトラブルもある。対応策も同じようになる。
この時、データベースを起動して、ORA-00704 ORA-00604 ORA-01502: index ‘SYS.I_DEPENDENCY1′ or partition of such index is in unusable stateエラが報告される:
SYS@lunar>shutdown abort
ORACLE instance shut down. SYS@lunar>startup mount ORACLE instance started.
Total System Global Area 167772160 bytes Fixed Size 1218316 bytes Variable Size 71305460 bytes Database Buffers 92274688 bytes Redo Buffers 2973696 bytes Database mounted. SYS@lunar>oradebug setmypid alter session set db_file_multiblocK_read_count=1; alter session set tracefile_identifier=’lunar’; Statement processed. Session altered.
SYS@lunar>oradebug event 10046 trace name context forever,level 12;
Session altered.
SYS@lunar>Statement processed. SYS@lunar>oradebug tracefile_name /home/oracle/oracle/product/admin/orcl/udump/orcl_ora_19783_lunar.trc SYS@lunar>alter database open; alter database open * ERROR at line 1: ORA-01092: ORACLE instance terminated. Disconnection forced
|
alert.logに情報は以下の通り
Mon Dec 22 09:13:29 2014
SMON: enabling cache recovery Mon Dec 22 09:13:29 2014 ARC2: Archival started ARC0: STARTING ARCH PROCESSES COMPLETE ARC0: Becoming the heartbeat ARCH ARC2 started with pid=17, OS id=19789 Mon Dec 22 09:13:32 2014 Deleted Oracle managed file /home/oracle/oracle/product/flash_recovery_area/ORCL/archivelog/2009_11_21/o1_mf_1_42_5jg30x9m_.arc Mon Dec 22 09:13:32 2014 Errors in file /home/oracle/oracle/product/admin/orcl/udump/orcl_ora_19783_lunar.trc: ORA-00704: bootstrap process failure ORA-00604: error occurred at recursive SQL level 1 ORA-01502: index ‘SYS.I_DEPENDENCY1’ or partition of such index is in unusable state Mon Dec 22 09:13:32 2014 Error 704 happened during db open, shutting down database USER: terminating instance due to error 704 Instance terminated by USER, pid = 19783 ORA-1092 signalled during: alter database open… |
Traceファイル情報:
PARSING IN CURSOR #5 len=179 dep=1 uid=0 oct=3 lid=0 tim=1385948058756927 hv=2812844157 ad=’29b07834′
select owner#,name,namespace,remoteowner,linkname,p_timestamp,p_obj#, nvl(property,0),subname,d_attrs from dependency$ d, obj$ o where d_obj#=:1 and p_obj#=obj#(+) order by order# END OF STMT PARSE #5:c=6999,e=70263,p=8,cr=40,cu=0,mis=1,r=0,dep=1,og=4,tim=1385948058756919 ===================== PARSING IN CURSOR #2 len=84 dep=2 uid=0 oct=3 lid=0 tim=1385948058757830 hv=2686874206 ad=’29b0652c’ select o.name, u.name from obj$ o, user$ u where o.obj# = :1 and o.owner# = u.user# END OF STMT PARSE #2:c=1000,e=266,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=1385948058757826 BINDS #2: kkscoacd Bind#0 oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00 oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0 kxsbbbfp=b72f40bc bln=22 avl=03 flg=05 value=122 ———》》obj#=122的正是I_DEPENDENCY1 EXEC #2:c=0,e=658,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=4,tim=1385948058758543 WAIT #2: nam=’db file sequential read’ ela= 15160 file#=1 block#=98 blocks=1 obj#=-1 tim=1385948058773774 WAIT #2: nam=’db file sequential read’ ela= 481 file#=1 block#=90 blocks=1 obj#=-1 tim=1385948058774587 FETCH #2:c=2000,e=16086,p=2,cr=5,cu=0,mis=0,r=1,dep=2,og=4,tim=1385948058774648 STAT #2 id=1 cnt=1 pid=0 pos=1 obj=0 op=’NESTED LOOPS (cr=5 pr=2 pw=0 time=16090 us)’ STAT #2 id=2 cnt=1 pid=1 pos=1 obj=18 op=’TABLE ACCESS BY INDEX ROWID OBJ$ (cr=3 pr=0 pw=0 time=28 us)’ STAT #2 id=3 cnt=1 pid=2 pos=1 obj=36 op=’INDEX UNIQUE SCAN I_OBJ1 (cr=2 pr=0 pw=0 time=16 us)’ STAT #2 id=4 cnt=1 pid=1 pos=2 obj=22 op=’TABLE ACCESS CLUSTER USER$ (cr=2 pr=2 pw=0 time=16050 us)’ STAT #2 id=5 cnt=1 pid=4 pos=1 obj=11 op=’INDEX UNIQUE SCAN I_USER# (cr=1 pr=1 pw=0 time=15264 us)’ ORA-00704: bootstrap process failure ORA-00604: error occurred at recursive SQL level 1 ORA-01502: index ‘SYS.I_DEPENDENCY1’ or partition of such index is in unusable state EXEC #1:c=252962,e=5328707,p=155,cr=730,cu=0,mis=0,r=0,dep=0,og=1,tim=1385948059778098 ERROR #1:err=1092 tim=432829200 |
ここで、次のアーカイブSQLのエラによって、データベースが起動できなくなるかもしれない:
select owner#,name,namespace,remoteowner,linkname,p_timestamp,p_obj#, nvl(property,0),subname,d_attrs
from dependency$ d, obj$ o where d_obj#=:1 and p_obj#=obj#(+) order by order#
ここのバインド変数は122で、I_DEPENDENCY1である。
今データベースを起動して、upgradeし、flags=1024を修正する。(つまり、そのインディクスが無効とマークする)。では、やってみよう:
[oracle@lunar oracle]$ ss
SQL*Plus: Release 10.2.0.1.0 – Production on Mon Dec 22 09:22:06 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SYS@lunar>startup mount ORACLE instance started.
Total System Global Area 167772160 bytes Fixed Size 1218316 bytes Variable Size 71305460 bytes Database Buffers 92274688 bytes Redo Buffers 2973696 bytes Database mounted. SYS@lunar>oradebug setmypid Statement processed. SYS@lunar>alter session set db_file_multiblocK_read_count=1;
Session altered.
SYS@lunar>alter session set tracefile_identifier=’lunar’;
Session altered.
SYS@lunar>oradebug event 10046 trace name context forever,level 12; Statement processed. SYS@lunar>oradebug tracefile_name /home/oracle/oracle/product/admin/orcl/udump/orcl_ora_19834_lunar.trc SYS@lunar>alter database open upgrade;
Database altered.
|
alert.log情報は以下の通り:
Mon Dec 22 09:23:02 2014
Successfully onlined Undo Tablespace 1. Mon Dec 22 09:23:02 2014 SMON: enabling tx recovery Mon Dec 22 09:23:03 2014 Database Characterset is ZHS16GBK Mon Dec 22 09:23:06 2014 Stopping background process MMNL Mon Dec 22 09:23:06 2014 Stopping background process MMON Starting background process MMON MMON started with pid=10, OS id=19842 Mon Dec 22 09:23:06 2014 Starting background process MMNL MMNL started with pid=11, OS id=19844 Mon Dec 22 09:23:06 2014 ALTER SYSTEM enable restricted session; Mon Dec 22 09:23:07 2014 ALTER SYSTEM SET _system_trig_enabled=FALSE SCOPE=MEMORY; Mon Dec 22 09:23:07 2014 ALTER SYSTEM SET aq_tm_processes=0 SCOPE=MEMORY; Mon Dec 22 09:23:07 2014 ALTER SYSTEM SET resource_manager_plan=” SCOPE=MEMORY; replication_dependency_tracking turned off (no async multimaster replication found) kwqiconfy: Warning AQ Kchunk open notifier failed with 1502 XDB UNINITIALIZED: XDB$SCHEMA not accessible Completed: alter database open upgrade 1
データベースがアップグレードモードを起動した。先のエラ文を探し出して、アップグレードモードにいると見つけた 1 ===================== PARSING IN CURSOR #4 len=221 dep=2 uid=0 oct=3 lid=0 tim=1385948615586776 hv=1926936385 ad=’29b04538′ select /* ordered use_nl(o) index(d) index(o) */ owner#,name,namespace,remoteowner,linkname,p_timestamp,p_obj#, nvl(property,0),subname,d_attrs from dependency$ d, obj$ o where d_obj#=:1 and p_obj#=obj#(+) order by order# END OF STMT PARSE #4:c=2999,e=3438,p=4,cr=35,cu=0,mis=1,r=0,dep=2,og=4,tim=1385948615586774 ===================== PARSING IN CURSOR #2 len=84 dep=3 uid=0 oct=3 lid=0 tim=1385948615587498 hv=2686874206 ad=’29b0396c’ select o.name, u.name from obj$ o, user$ u where o.obj# = :1 and o.owner# = u.user# END OF STMT PARSE #2:c=0,e=279,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=4,tim=1385948615587494 BINDS #2: kkscoacd Bind#0 oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00 oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0 kxsbbbfp=b725753c bln=22 avl=03 flg=05 value=122 EXEC #2:c=1000,e=534,p=0,cr=0,cu=0,mis=1,r=0,dep=3,og=4,tim=1385948615588087 FETCH #2:c=0,e=56,p=0,cr=5,cu=0,mis=0,r=1,dep=3,og=4,tim=1385948615588159 STAT #2 id=1 cnt=1 pid=0 pos=1 obj=0 op=’NESTED LOOPS (cr=5 pr=0 pw=0 time=60 us)’ STAT #2 id=2 cnt=1 pid=1 pos=1 obj=18 op=’TABLE ACCESS BY INDEX ROWID OBJ$ (cr=3 pr=0 pw=0 time=26 us)’ STAT #2 id=3 cnt=1 pid=2 pos=1 obj=36 op=’INDEX UNIQUE SCAN I_OBJ1 (cr=2 pr=0 pw=0 time=15 us)’ STAT #2 id=4 cnt=1 pid=1 pos=2 obj=22 op=’TABLE ACCESS CLUSTER USER$ (cr=2 pr=0 pw=0 time=23 us)’ STAT #2 id=5 cnt=1 pid=4 pos=1 obj=11 op=’INDEX UNIQUE SCAN I_USER# (cr=1 pr=0 pw=0 time=6 us)’ |
具体的なSQL:
select /* ordered use_nl(o) index(d) index(o) */ owner#,name,namespace,remoteowner,linkname,p_timestamp,p_obj#, nvl(property,0),subname,d_attrs
from dependency$ d, obj$ o where d_obj#=:1 and p_obj#=obj#(+) order by order# |
dba_objectsを検索し、ORA-00604 ORA-01502: index ‘SYS.I_DEPENDENCY1′ or partition of such index is in unusable stateエラになる。
原因は以上のように、インディクスが壊された。けどOracleは依然としそのインディクスを使うから、エラになる:
SYS@lunar>select owner,object_id,object_name,object_type from dba_objects where object_id in (92,122,123);
select owner,object_id,object_name,object_type from dba_objects where object_id in (92,122,123) * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 ORA-01502: index ‘SYS.I_DEPENDENCY1’ or partition of such index is in unusable state |
では、なぜOracleが起動できるか?
これはOracleがUpgradeモードにいれば、いくつか普通の起動と違った操作がある。
正常にデータベースを起動した時に、アーカイブsqlでOBJ#とUSER#を獲得すると、実行計画はI_DEPENDENCY1でDEPENDENCY1をスキャンする。
インディクスが使えなくなったからデータベースも起動できなくなった。それにupgradeモードでデータベースを起動すると、/* ordered use_nl(o) index(d) index(o) */ hintをつかう。
OBJ#を獲得したときに、oid$を使ってobj#を獲得するから、使えなくなった。SYS.I_DEPENDENCY1インディクスも使っていないから、upgradeモードでデータベースを起動できる。
tkprofでこのアーカイブsqlの実行計画が見られる:
select /* ordered use_nl(o) index(d) index(o) */ owner#,name,namespace,
remoteowner,linkname,p_timestamp,p_obj#, nvl(property,0),subname,d_attrs from dependency$ d, obj$ o where d_obj#=:1 and p_obj#=obj#(+) order by order#
call count cpu elapsed disk query current rows ——- —— ——– ———- ———- ———- ———- ———- Parse 5 0.00 0.00 0 0 0 0 Execute 0 0.00 0.00 0 0 0 0 Fetch 0 0.00 0.00 0 0 0 0 ——- —— ——– ———- ———- ———- ———- ———- total 5 0.00 0.00 0 0 0 0
Misses in library cache during parse: 5 Optimizer mode: CHOOSE Parsing user id: SYS (recursive depth: 2) ********************************************************************************
select obj# from oid$ where user#=:1 and oid$=:2
call count cpu elapsed disk query current rows ——- —— ——– ———- ———- ———- ———- ———- Parse 1 0.00 0.00 0 0 0 0 Execute 2 0.00 0.00 0 0 0 0 Fetch 2 0.00 0.01 3 5 0 1 ——- —— ——– ———- ———- ———- ———- ———- total 5 0.00 0.02 3 5 0 1
Misses in library cache during parse: 1 Misses in library cache during execute: 1 Optimizer mode: CHOOSE Parsing user id: SYS (recursive depth: 1)
Rows Row Source Operation ——- ————————————————— 0 TABLE ACCESS BY INDEX ROWID OID$ (cr=2 pr=2 pw=0 time=7433 us) 0 INDEX UNIQUE SCAN I_OID1 (cr=2 pr=2 pw=0 time=7419 us)(object id 179)
Elapsed times include waiting on following events: Event waited on Times Max. Wait Total Waited —————————————- Waited ———- ———— db file sequential read 3 0.00 0.01 |
oid$の定義は以下の通り:
create table oid$ /* OID mapping table for schema objects */
( user# number not null, /* user this mapping is for (user$.user#) */ oid$ raw(16) not null, /* OID for typed table/view or type */ obj# number not null) /* target object number (obj$.obj#) */ /* key: (user#, oid$) */ / |
ここで以下のようにリカバリする:
[oracle@lunar oracle]$ ss
SQL*Plus: Release 10.2.0.1.0 – Production on Mon Dec 22 08:10:07 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production With the Partitioning, OLAP and Data Mining options
SYS@lunar>select obj# from obj$ where name=’I_DEPENDENCY1′;
OBJ# ———- 122
SYS@lunar>update ind$ set flags=1024 where obj#=122;
1 row updated.
SYS@lunar>select flags,obj# from ind$ where obj#=122;
FLAGS OBJ# ———- ———- 1024 122
SYS@lunar>commit;
Commit complete.
制約モードでデータベースを再起動する: SYS@lunar>alter index i_dependency1 rebuild 2 ;
Index altered.
SYS@lunar>analyze table dependency$ validate structure cascade;
Table analyzed.
SYS@lunar>select owner,table_name,index_name,tablespace_name,status from dba_indexes where table_name=’DEPENDENCY$’;
OWNER TABLE_NAME INDEX_NAME TABLESPACE_NAME STATUS ————— —————————— —————————— —————————— ——– SYS DEPENDENCY$ I_DEPENDENCY1 SYSTEM VALID SYS DEPENDENCY$ I_DEPENDENCY2 SYSTEM VALID
|
ここで、データベースを完璧にリカバリした