下面的测试来至于今天群里面一个朋友，open数据库的时候遇到了ORA-00600 4194错误，这个错误比较常见，并且处理方法也很简单。但是在修改参数的时候，不知道怎么去查看UNDO段的名字。下面简单的测试一把
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1，数据库版本
| www.htz.pw > select * from v$version;
BANNER -------------------------------------------------------------------------------- Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production PL/SQL Release 11.2.0.4.0 - Production CORE 11.2.0.4.0 Production TNS for Linux: Version 11.2.0.4.0 - Production NLSRTL Version 11.2.0.4.0 - Production |
2，查看undo$的定义信息
| create table undo$ /* undo segment table */ ( us# number not null, /* undo segment number */ name varchar2("M_IDEN") not null, /* name of this undo segment */ user# number not null, /* owner: 0 = SYS(PRIVATE), 1 = PUBLIC */ file# number not null, /* segment header file number */ block# number not null, /* segment header block number */ scnbas number, /* highest commit time in rollback segment */ scnwrp number, /* scnbas - scn base, scnwrp - scn wrap */ xactsqn number, /* highest transaction sequence number */ undosqn number, /* highest undo block sequence number */ inst# number, /* parallel server instance that owns the segment */ status$ number not null, /* segment status (see KTS.H): */ /* 1 = INVALID, 2 = AVAILABLE, 3 = IN USE, 4 = OFFLINE, 5 = NEED RECOVERY, * 6 = PARTLY AVAILABLE (contains in-doubt txs) */ ts# number, /* tablespace number */ ugrp# number, /* The undo group it belongs to */ keep number, optimal number, flags number, spare1 number, spare2 number, spare3 number, spare4 varchar2(1000), spare5 varchar2(1000), spare6 date )
CREATE TABLE UNDO$ ( "US#" NUMBER NOT NULL, "NAME" VARCHAR2 (30) NOT NULL, "USER#" NUMBER NOT NULL, "FILE#" NUMBER NOT NULL, "BLOCK#" NUMBER NOT NULL, "SCNBAS" NUMBER, "SCNWRP" NUMBER, "XACTSQN" NUMBER, "UNDOSQN" NUMBER, "INST#" NUMBER, "STATUS$" NUMBER NOT NULL, "TS#" NUMBER, "UGRP#" NUMBER, "KEEP" NUMBER, "OPTIMAL" NUMBER, "FLAGS" NUMBER, "SPARE1" NUMBER, "SPARE2" NUMBER, "SPARE3" NUMBER, "SPARE4" VARCHAR2 (1000), "SPARE5" VARCHAR2 (1000), "SPARE6" DATE ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 STORAGE (INITIAL 64 K NEXT 1024 K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 15 EXTENTS ( FILE 1 BLOCK 224 ));
标注为绿色部分的信息是我们需要使用的 |
3，dump控制文件
| www.htz.pw > oradebug setmypid Statement processed. www.htz.pw > oradebug dump controlf 4; Statement processed. www.htz.pw > oradebug tracefile_name; /oracle/app/oracle/diag/rdbms/orcl1124/orcl1124/trace/orcl1124_ora_13293.trc
以SYSTEM来查找
TABLESPACE #0 SYSTEM: recno=1 First datafile link=1 Tablespace Flag=0 Tablespace PITR mode start scn: 0x0000.00000000 01/01/1988 00:00:00 Tablespace PITR last completion scn: 0x0000.00000000 01/01/1988 00:00:00
以tablespace 0来查找 *************************************************************************** DATA FILE RECORDS *************************************************************************** (size = 520, compat size = 520, section max = 100, section in-use = 5, last-recid= 225, old-recno = 0, last-recno = 0) (extent = 1, blkno = 11, numrecs = 100) DATA FILE #1: name #8: /oracle/app/oracle/oradata/orcl1124/system01.dbf creation size=0 block size=8192 status=0xe head=8 tail=8 dup=1
tablespace 0, index=1 krfil=1 prev_file=0 unrecoverable scn: 0x0000.00000000 01/01/1988 00:00:00 Checkpoint cnt:322 scn: 0x0000.001bca2a 05/14/2014 23:21:31 Stop scn: 0xffff.ffffffff 05/14/2014 23:20:23 Creation Checkpointed at scn: 0x0000.00000007 08/24/2013 11:37:33 thread:0 rba:(0x0.0.0)
下面是undo的信息
TABLESPACE #2 UNDOTBS1: recno=3 First datafile link=3 Tablespace Flag=0 Tablespace PITR mode start scn: 0x0000.00000000 01/01/1988 00:00:00 Tablespace PITR last completion scn: 0x0000.00000000 01/01/1988 00:00:00
UNDO表空间的TS#=2 |
4，bbed来查看UNDO段的名字
| BBED> set block 225 BLOCK# 225
BBED> map File: /oracle/app/oracle/oradata/orcl1124/system01.dbf (0) Block: 225 Dba:0x00000000 ------------------------------------------------------------ KTB Data Block (Table/Cluster)
struct kcbh, 20 bytes @0
struct ktbbh, 48 bytes @20
struct kdbh, 14 bytes @68
struct kdbt[1], 4 bytes @82
sb2 kdbr[21] @86
ub1 freespace[4075] @128
ub1 rowdata[3985] @4203
ub4 tailchk @8188
BBED> p kdbr sb2 kdbr[0] @86 8078 sb2 kdbr[1] @88 5083 sb2 kdbr[2] @90 5015 sb2 kdbr[3] @92 4947 sb2 kdbr[4] @94 4270 sb2 kdbr[5] @96 4812 sb2 kdbr[6] @98 4135 sb2 kdbr[7] @100 4676 sb2 kdbr[8] @102 4609 sb2 kdbr[9] @104 4541 sb2 kdbr[10] @106 4472 sb2 kdbr[11] @108 5877 sb2 kdbr[12] @110 5814 sb2 kdbr[13] @112 5748 sb2 kdbr[14] @114 5682 sb2 kdbr[15] @116 5616 sb2 kdbr[16] @118 5550 sb2 kdbr[17] @120 5484 sb2 kdbr[18] @122 5418 sb2 kdbr[19] @124 5352 sb2 kdbr[20] @126 5286
x /rnc *kdbr[0] x /rnc *kdbr[1] x /rnc *kdbr[2] x /rnc *kdbr[3] x /rnc *kdbr[4] x /rnc *kdbr[5] x /rnc *kdbr[6] x /rnc *kdbr[7] x /rnc *kdbr[8] x /rnc *kdbr[9] x /rnc *kdbr[10] x /rnc *kdbr[11] x /rnc *kdbr[12] x /rnc *kdbr[13] x /rnc *kdbr[14] x /rnc *kdbr[15] x /rnc *kdbr[16] x /rnc *kdbr[17] x /rnc *kdbr[18] x /rnc *kdbr[19] x /rnc *kdbr[20]
将结果输出到文件。 以UE打开，可以得到下面的结果，或者 grep就可以，这里还需要注意的是表空间的
col 1[20] @5157: _SYSSMU1_3724004606$ col 1[20] @5089: _SYSSMU2_2996391332$ col 1[20] @5021: _SYSSMU3_1723003836$ col 1[20] @4344: _SYSSMU4_1254879796$ col 1[20] @4209: _SYSSMU6_1263032392$ col 1[20] @4750: _SYSSMU7_2070203016$ col 1[20] @4615: _SYSSMU9_1650507775$ col 1[21] @4546: _SYSSMU10_1197734989$ col 1[20] @5951: _SYSSMU11_894599432$ col 1[21] @5888: _SYSSMU12_1573055333$ col 1[21] @5822: _SYSSMU13_3860906822$ col 1[21] @5756: _SYSSMU14_3319140121$ col 1[21] @5690: _SYSSMU15_1436577151$ col 1[21] @5624: _SYSSMU16_1689093467$ col 1[21] @5558: _SYSSMU17_1049158485$ col 1[21] @5492: _SYSSMU18_1557221903$ col 1[21] @5426: _SYSSMU19_2284825117$ col 1[21] @5360: _SYSSMU20_2312497597$ |
5，使用strings的方法
这种方法最简单，但是不能区别UNDO段的表空间，并且会将块中所有的UNDO段的段名显示，包括已经被删除的UNDO段
| [oracle@www.htz.pw sql]$dd if=/oracle/app/oracle/oradata/orcl1124/system01.dbf of=/soft/test.dbf skip=224 count=8 bs=8192 8+0 records in 8+0 records out
[oracle@www.htz.pw soft]$strings test.dbf |grep SYSSM|sort -u _SYSSMU10_1197734989$ _SYSSMU10_3470984480$ _SYSSMU11_894599432$ _SYSSMU12_1573055333$ _SYSSMU1_2603659607$ _SYSSMU13_3860906822$ _SYSSMU1_3724004606$ _SYSSMU14_3319140121$ _SYSSMU15_1436577151$ _SYSSMU16_1689093467$ _SYSSMU17_1049158485$ _SYSSMU18_1557221903$ _SYSSMU19_2284825117$ _SYSSMU20_2312497597$ _SYSSMU2_2996391332$ _SYSSMU2_73114111$ _SYSSMU3_1723003836$ _SYSSMU3_596277271$ _SYSSMU4_1254879796$ _SYSSMU4_2523322691$ _SYSSMU5_4008018903$ _SYSSMU5_898567397$ _SYSSMU6_1263032392$ _SYSSMU6_4235600416$ _SYSSMU7_2070203016$ _SYSSMU7_2271882308$ _SYSSMU8_517538920$ _SYSSMU8_854328387$ _SYSSMU9_1650507775$ _SYSSMU9_508477954$
|
6，使用第三方抽数据工具
这里使用的ODU来测试
| [oracle@www.htz.pw odu]$cat control.txt #ts fno rfno filename block_size is_big_file header_offset blocks 0 0 0 /oracle/app/oracle/oradata/orcl1124/system01.dbf 这里我只写了SYSTEM表空间，因为UNDO$在SYSTEM表空间中
[oracle@www.htz.pw odu]$./odu
ODU> unload dict CLUSTER C_USER# file_no: 1 block_no: 208 TABLE OBJ$ file_no: 1 block_no: 240 CLUSTER C_OBJ# file_no: 1 block_no: 144 CLUSTER C_OBJ# file_no: 1 block_no: 144 found IND$‘s obj# 19 found IND$‘s dataobj#:2,ts#:0,file#:1,block#:144,tab#:3 found TABPART$‘s obj# 591 found TABPART$‘s dataobj#:591,ts#:0,file#:1,block#:4000,tab#:0 found INDPART$‘s obj# 596 found INDPART$‘s dataobj#:596,ts#:0,file#:1,block#:4040,tab#:0 found TABSUBPART$‘s obj# 603 found TABSUBPART$‘s dataobj#:603,ts#:0,file#:1,block#:4096,tab#:0 found INDSUBPART$‘s obj# 608 found INDSUBPART$‘s dataobj#:608,ts#:0,file#:1,block#:4136,tab#:0 found IND$‘s obj# 19 found IND$‘s dataobj#:2,ts#:0,file#:1,block#:144,tab#:3 found LOB$‘s obj# 80 found LOB$‘s dataobj#:2,ts#:0,file#:1,block#:144,tab#:6 found LOBFRAG$‘s obj# 624 found LOBFRAG$‘s dataobj#:624,ts#:0,file#:1,block#:4264,tab#:0
ODU> unload table sys.undo$
Unloading table: UNDO$,object ID: 15 Unloading segment,storage(Obj#=15 DataObj#=15 TS#=0 File#=1 Block#=224 Cluster=0) 21 rows unloaded
[oracle@www.htz.pw odu]$cd data [oracle@www.htz.pw data]$cat SYS_UNDO$.txt 0|SYSTEM|0|1|128|0|0|0|0|0|3|0|||||0 1|_SYSSMU1_3724004606$|1|3|128|1774525|0|862|222|0|3|2|||||2 2|_SYSSMU2_2996391332$|1|3|144|1774529|0|1083|212|0|3|2|||||2 3|_SYSSMU3_1723003836$|1|3|160|1774527|0|1077|217|0|3|2|||||2 4|_SYSSMU4_1254879796$|1|3|176|1774531|0|928|300|0|3|2|||||2 5|_SYSSMU5_898567397$|1|3|192|1774515|0|1075|229|0|3|2|||||2 6|_SYSSMU6_1263032392$|1|3|208|1774519|0|1262|286|0|3|2|||||2 7|_SYSSMU7_2070203016$|1|3|224|1774517|0|868|179|0|3|2|||||2 8|_SYSSMU8_517538920$|1|3|240|1774523|0|1105|335|0|3|2|||||2 9|_SYSSMU9_1650507775$|1|3|256|1774521|0|1088|402|0|3|2|||||2 10|_SYSSMU10_1197734989$|1|3|272|1774533|0|866|238|0|3|2|||||2 11|_SYSSMU11_894599432$|1|5|128|923330|0|2|1|0|1|5|||||2 12|_SYSSMU12_1573055333$|1|5|144|0|0|1|1|0|1|5|||||2 13|_SYSSMU13_3860906822$|1|5|160|923661|0|2|1|0|1|5|||||2 14|_SYSSMU14_3319140121$|1|5|176|923323|0|2|1|0|1|5|||||2 15|_SYSSMU15_1436577151$|1|5|192|923332|0|2|1|0|1|5|||||2 16|_SYSSMU16_1689093467$|1|5|208|923314|0|2|1|0|1|5|||||2 17|_SYSSMU17_1049158485$|1|5|224|923296|0|2|1|0|1|5|||||2 18|_SYSSMU18_1557221903$|1|5|240|923320|0|2|1|0|1|5|||||2 19|_SYSSMU19_2284825117$|1|5|256|923294|0|2|1|0|1|5|||||2 20|_SYSSMU20_2312497597$|1|5|272|923262|0|2|1|0|1|5|||||2
在DUMP的控制文件中我们能看到下面的信息 TABLESPACE #2 UNDOTBS1: recno=3 First datafile link=3 Tablespace Flag=0 Tablespace PITR mode start scn: 0x0000.00000000 01/01/1988 00:00:00 Tablespace PITR last completion scn: 0x0000.00000000 01/01/1988 00:00:00
UNDO表空间的TS#=2
[oracle@www.htz.pw data]$awk -F\| ‘{ print $2,$12}‘ SYS_UNDO$.txt SYSTEM 0 _SYSSMU1_3724004606$ 2 _SYSSMU2_2996391332$ 2 _SYSSMU3_1723003836$ 2 _SYSSMU4_1254879796$ 2 _SYSSMU5_898567397$ 2 _SYSSMU6_1263032392$ 2 _SYSSMU7_2070203016$ 2 _SYSSMU8_517538920$ 2 _SYSSMU9_1650507775$ 2 _SYSSMU10_1197734989$ 2 _SYSSMU11_894599432$ 5 _SYSSMU12_1573055333$ 5 _SYSSMU13_3860906822$ 5 _SYSSMU14_3319140121$ 5 _SYSSMU15_1436577151$ 5 _SYSSMU16_1689093467$ 5 _SYSSMU17_1049158485$ 5 _SYSSMU18_1557221903$ 5 _SYSSMU19_2284825117$ 5 _SYSSMU20_2312497597$ 5 |
数据库不能open下查看undo段的名字,布布扣,bubuko.com
原文：http://luoping.blog.51cto.com/534596/1411361