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"Undo 세미나"의 두 판 사이의 차이

DB CAFE

(→‎trace file 분석)
(→‎Block dump from cache)
532번째 줄: 532번째 줄:
 
===== Block dump from cache =====
 
===== Block dump from cache =====
 
<source lang=sql>
 
<source lang=sql>
−
Start dump data blocks tsn: 6 file#:13 minblk 132 maxblk 132
+
Start dump data blocks tsn: 0 file#:1 minblk 443673 maxblk 443673
 
Block dump from cache:
 
Block dump from cache:
−
Dump of buffer cache at level 3 for pdb=1 tsn=6 rdba=54526084
+
Dump of buffer cache at level 3 for pdb=1 tsn=0 rdba=4637977
−
BH (0x7cf64db8) file#: 13 rdba: 0x03400084 (13/132) class: 1 ba: 0x7c20a000
+
BH (0xb1f596e8) file#: 1 rdba: 0x0046c519 (1/443673) class: 1 ba: 0xb1106000
−
   set: 10 pool: 3 bsz: 8192 bsi: 0 sflg: 0 pwc: 0,0
+
   set: 11 pool: 3 bsz: 8192 bsi: 0 sflg: 0 pwc: 0,0
−
   dbwrid: 0 obj: 73712 objn: 73712 tsn: [1/6] afn: 13 hint: f
+
   dbwrid: 0 obj: 73789 objn: 73789 tsn: [1/0] afn: 1 hint: f
−
   hash: [0x75181db8,0x75181db8] lru: [0x9afaa2c0,0x8cf53998]
+
   hash: [0x9ff8d278,0x752a2038] lru: [0xb9fbc740,0xaefe2990]
 
   ckptq: [NULL] fileq: [NULL]
 
   ckptq: [NULL] fileq: [NULL]
−
   objq: [0x6667add0,0x6667add0] objaq: [0x6667adc0,0x6667adc0]
+
   objq: [0x6ccce6b8,0x6ccce6b8] objaq: [0x6ccce6a8,0x6ccce6a8]
−
   st: XCURRENT md: NULL fpin: 'ktspbwh2: ktspfmdb' fscn: 0x273bb5 tch: 2
+
   st: XCURRENT md: NULL fpin: 'kdswh11: kdst_fetch' fscn: 0x28c8fa tch: 1
−
   flags: block_written_once
+
   flags: only_sequential_access
−
   LRBA: [0x0.0.0] LSCN: [0x0] HSCN: [0x273bb5] HSUB: [3]
+
   LRBA: [0x0.0.0] LSCN: [0x0] HSCN: [0x0] HSUB: [65535]
 
   Printing buffer operation history (latest change first):
 
   Printing buffer operation history (latest change first):
 
   cnt: 3
 
   cnt: 3
−
   01. sid:00 L192:kcbbic2:bic:FBD     02. sid:00 L191:kcbbic2:bic:FBW 
+
   01. sid:11 L338:zibmlt:set:MSHR     02. sid:11 L144:zibmlt:mk:EXCL   
−
   03. sid:00 L602:bic1_int:bis:FWC    04. sid:00 L822:bic1_int:ent:rtn  
+
   03. sid:11 L122:zgb:set:st          04. sid:11 L830:olq1:clr:WRT+CKT  
−
   05. sid:00 L832:oswmqbg1:clr:WRT    06. sid:00 L930:kubc:sw:mq       
+
   05. sid:11 L951:zgb:lnk:objq        06. sid:11 L372:zgb:set:MEXCL   
−
   07. sid:00 L913:bxsv:sw:objq        08. sid:00 L608:bxsv:bis:FBW     
+
   07. sid:11 L123:zgb:no:FEN          08. sid:11 L083:zgb:ent:fn       
−
   09. sid:00 L607:bxsv:bis:FFW        10. sid:05 L464:chg1_mn:bic:FMS 
+
   09. sid:11 L154:z_sw_cur:bic:FPB    10. sid:11 L940:z_sw_cur:sw:cq   
−
   11. sid:05 L778:chg1_mn:bis:FMS    12. sid:05 L353:gcur:set:MEXCL   
+
   11. sid:11 L070:zswcu:ent:ob        12. sid:11 L471:bpostapl:bic:FMS 
−
   13. sid:05 L464:chg1_mn:bic:FMS    14. sid:05 L614:chg1_mn:bis:FBD 
+
   13. sid:11 L786:pre_apl:bis:FMS    14. sid:11 L353:gcur:set:MEXCL   
−
   15. sid:05 L922:klbc:sw:cq          16. sid:05 L778:chg1_mn:bis:FMS   
+
   15. sid:11 L471:bpostapl:bic:FMS    16. sid:11 L786:pre_apl:bis:FMS   
−
   buffer tsn: 6 rdba: 0x03400084 (13/132)
+
   buffer tsn: 0 rdba: 0x0046c519 (1/443673)
−
   scn: 0x273bb5 seq: 0x03 flg: 0x04 tail: 0x3bb50603
+
   scn: 0x28c8f2 seq: 0x02 flg: 0x04 tail: 0xc8f20602
−
   frmt: 0x02 chkval: 0x0e55 type: 0x06=trans data
+
   frmt: 0x02 chkval: 0x9c7f type: 0x06=trans data
 
Hex dump of block: st=0, typ_found=1
 
Hex dump of block: st=0, typ_found=1
−
Dump of memory from 0x000000007C20A000 to 0x000000007C20C000
+
Dump of memory from 0x00000000B1106000 to 0x00000000B1108000
 +
 
 
..... 생략 ......
 
..... 생략 ......
 
</source>
 
</source>
−
 
−
 
  
 
===== Block header dump =====
 
===== Block header dump =====

2024년 6월 24일 (월) 21:37 판

thumb_up 추천메뉴 바로가기

1 언두 테스트[편집]

SELECT SUBSTR(SEGMENT_NAME, 1, 20) TB , BYTES/1024/1024 "MB", BLOCKS 
  FROM USER_SEGMENTS 
 WHERE SEGMENT_NAME IN ( 'TB_BIG','TB_BIG2');
 -- SHARED_POOL/BUFFER_POOL/FLASH_CACHE/BUFFER_CACHE/GLOBAL CONTEXT/PASSWORDFILE_METADATA_CACHE 키워드
 
alter system flush FLASH_CACHE;
alter system flush BUFFER_CACHE;

alter table tb_big rename to tb_big2;

drop table tb_big2 purge;

alter table tb_big rename to tb_big2;


SELECT A.TABLESPACE_NAME,A.STATUS, B.TOTAL_MB, A.USE_MB,
       ROUND(RATIO_TO_REPORT(A.USE_MB) OVER(PARTITION BY A.TABLESPACE_NAME) * 100)||'%' AS PCT
  FROM (SELECT TABLESPACE_NAME, STATUS,
               ROUND(SUM(BYTES/1024/1024)) USE_MB
          FROM DBA_UNDO_EXTENTS
         GROUP BY TABLESPACE_NAME,STATUS
       )A,
       (SELECT TABLESPACE_NAME, ROUND(SUM(BYTES)/1024/1024) TOTAL_MB
          FROM DBA_DATA_FILES
         WHERE TABLESPACE_NAME LIKE 'UNDO%'
         GROUP BY TABLESPACE_NAME
       )B
 WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME
 ORDER BY 1,2
 ;
 
 SELECT SUBSTRB(A.SEGMENT_NAME, 1, 10) AS SEGMENT_NAME
     , SUBSTRB(A.TABLESPACE_NAME, 1, 10) AS TABLESPACE_NAME
     , TO_CHAR(A.SEGMENT_ID, '99,999') AS SEG_ID
     , TO_CHAR(A.MAX_EXTENTS, '999,999') AS MAX_EXT
     , TO_CHAR(B.EXTENTS, '999,999') AS EXTENTS
     , TO_CHAR(B.EXTENDS, '999,999') AS EXTENDS
     , TO_CHAR((A.INITIAL_EXTENT + (B.EXTENTS - 1) * A.NEXT_EXTENT) / 1000000, '9,999.999') AS "ALLOC(MB)"
     , TO_CHAR(XACTS, '9,999') AS XACTS
  FROM DBA_ROLLBACK_SEGS A
     , V$ROLLSTAT B
 WHERE A.SEGMENT_ID = B.USN(+) ORDER BY 1;
 
 
 SELECT group#
    , status
    , member
 FROM v$logfile;
 
 select * from V$ARCHIVED_LOG;
 
 select * from v$parameter where name like  '%log%';
 
 alter system set log_archive_format='%t_%s_%r.arc' scope=spfile;
 
 
drop table tb_big3 purge;

 create table tb_big3
as
select cola,colb,22 as colc,cold,cole,colf,colg,colh,coli
from tb_big;

select count(*) from tb_big;
alter system switch logfile;
-- 테이블 생성 
CREATE TABLE TB_BIG(
  COLA VARCHAR2(20), COLB NUMBER      , COLC NUMBER, 
  COLD VARCHAR2(30), COLE VARCHAR2(30), COLF VARCHAR2(30), 
  COLG NUMBER      , COLH VARCHAR2(30), COLI VARCHAR2(30)
);

-- DATA 입력 
DECLARE
TYPE tbl_ins IS TABLE OF TB_BIG%ROWTYPE INDEX BY BINARY_INTEGER;
w_ins tbl_ins;
BEGIN
FOR i IN 1..8960000 LOOP 
   w_ins(i).COLA :=i;
   w_ins(i).COLB :=300000;
   w_ins(i).COLC :=99; -- <== 변경 테스트 대상 컬럼 99를 11로 변경 
   w_ins(i).COLD :='ABC'||dbms_random.string('x',10); 
   w_ins(i).COLE :='EEEEEEEEEEEEEEEE';
   w_ins(i).COLF :='FFFFFFFFFFFFFFFF';
   w_ins(i).COLG :=9999999;
   w_ins(i).COLH :='HHHHHHHHHHHHHHHHHHHHHHHHHH';
   w_ins(i).COLI :='IIIIIIIIIIIIIIIIIIIIIIIIII';
END LOOP;
   FORALL i in 1..8960000 INSERT INTO TB_BIG VALUES w_ins(i);
   COMMIT;
END;
/
-- 8,960,000 건
TB                           MB     BLOCKS
-------------------- ---------- ----------
TB_BIG                     1216     155648

1.1 UPDATE 테스트[편집]

sh-4.2$ cat update_tb_big.sql
update tb_big set colc=11;
commit;
====== 시작 ======
15:46:35 SQL> @update_tb_big.sql

8960000 rows updated.


Commit complete.

15:54:14 SQL>
====== 종료 ====== 총 7분 40초 , 460초

1.2 CTAS 테스트[편집]

sh-4.2$ cat ctas_tb_big.sql
-- rename old 
alter table tb_big rename to tb_big_old;
-- ctas 
create table tb_big
as
select cola,colb,22 as colc
     , cold,cole,colf,colg,colh,coli
from tb_big_old;


====== 시작 ======
15:58:56 SQL> @ctas_tb_big.sql

Table created.

15:59:22 SQL>
====== 종료 ======= 총 26초

2 archive log mode 인경우 테스트[편집]

16:28:03 SQL> @update_tb_big.sql

8960000 rows updated.


Commit complete.

16:35:46 SQL>
====== 종료 ====== 총 7분 43초 , 463초

2.1 UPDATE 테스트[편집]

  • 아카이빙 로그 사이즈
    • 로그 테스트 전
bash-4.2# du -h
16K	.
    • 로그 테스트 후
-rw-r----- 1 oracle oinstall 196845056 Jun 16 16:28 arch1_37_1171284405.dbf
-rw-r----- 1 oracle oinstall 195198976 Jun 16 16:29 arch1_38_1171284405.dbf
-rw-r----- 1 oracle oinstall 194925056 Jun 16 16:29 arch1_39_1171284405.dbf
-rw-r----- 1 oracle oinstall 195596288 Jun 16 16:30 arch1_40_1171284405.dbf
-rw-r----- 1 oracle oinstall 195552256 Jun 16 16:30 arch1_41_1171284405.dbf
-rw-r----- 1 oracle oinstall 195438592 Jun 16 16:31 arch1_42_1171284405.dbf
-rw-r----- 1 oracle oinstall 189432320 Jun 16 16:31 arch1_43_1171284405.dbf
-rw-r----- 1 oracle oinstall 183622656 Jun 16 16:32 arch1_44_1171284405.dbf
-rw-r----- 1 oracle oinstall 190867456 Jun 16 16:32 arch1_45_1171284405.dbf
-rw-r----- 1 oracle oinstall 190482432 Jun 16 16:33 arch1_46_1171284405.dbf
-rw-r----- 1 oracle oinstall 190621696 Jun 16 16:33 arch1_47_1171284405.dbf
-rw-r----- 1 oracle oinstall 191492608 Jun 16 16:34 arch1_48_1171284405.dbf
-rw-r----- 1 oracle oinstall 185030144 Jun 16 16:34 arch1_49_1171284405.dbf
-rw-r----- 1 oracle oinstall 188132864 Jun 16 16:35 arch1_50_1171284405.dbf
drwxr-xr-x 1 oracle dba           4096 Jun 16 16:35 .
-rw-r----- 1 oracle oinstall 179443200 Jun 16 16:35 arch1_51_1171284405.dbf
bash-4.2# date
Sun Jun 16 16:41:50 UTC 2024
bash-4.2# du -k
2795632	.
bash-4.2# du -h
2.7G	.

2.2 CTAS 테스트[편집]

bash-4.2# ls -altr
total 1358964
-rw-r--r-- 1 oracle dba           3079 May 14  2015 init.ora
drwxr-xr-x 1 oracle dba           4096 Jun 10 12:44 ..
-rw-r----- 1 oracle oinstall        24 Jun 10 12:44 lkMONGO
lrwxrwxrwx 1 oracle oinstall        54 Jun 10 13:07 spfileMONGO.ora -> /u01/app/oracle/oradata/dbconfig/MONGO/spfileMONGO.ora
lrwxrwxrwx 1 oracle oinstall        49 Jun 10 13:07 orapwMONGO -> /u01/app/oracle/oradata/dbconfig/MONGO/orapwMONGO
-rw-rw---- 1 oracle oinstall      1544 Jun 16 16:27 hc_MONGO.dat
-rw-r----- 1 oracle oinstall 198791168 Jun 16 16:49 arch1_52_1171284405.dbf
-rw-r----- 1 oracle oinstall 198788096 Jun 16 16:49 arch1_53_1171284405.dbf
-rw-r----- 1 oracle oinstall 198794240 Jun 16 16:49 arch1_54_1171284405.dbf
-rw-r----- 1 oracle oinstall 198791680 Jun 16 16:49 arch1_55_1171284405.dbf
-rw-r----- 1 oracle oinstall 198794240 Jun 16 16:49 arch1_56_1171284405.dbf
-rw-r----- 1 oracle oinstall 198794240 Jun 16 16:49 arch1_57_1171284405.dbf
drwxr-xr-x 1 oracle dba           4096 Jun 16 16:49 .
-rw-r----- 1 oracle oinstall 198789120 Jun 16 16:49 arch1_58_1171284405.dbf

bash-4.2# du -k ./
1358956	./

bash-4.2# du -h ./
1.3G	./

3 CTAS NOLOGGING MODE[편집]

3.1 ctas nologging mode[편집]

bash-4.2# du -h
16K	.
  • 00:19.21 소요
-- UNRECOVERABLE 옵션 사용 
SQL> @ctas_tb_big_nolog.sql

Table altered.

Elapsed: 00:00:00.03

Table created.

Elapsed: 00:00:19.21

3.2 ctas nolooging 처리후[편집]

bash-4.2# du -h
1.2G	.
==> nolooging 인데도 사이즈가 크게 줄지 않음......


--- 테이블 drop 시 
drop table tb_big2 purge; 

bash-4.2# du -h
1.3G	.


3.3 insert ~ select nologging[편집]

  • 01:19 초 소요
SQL> @ins_sel_nologging.sql

Table altered.

Elapsed: 00:00:00.07

Table created.

Elapsed: 00:00:00.10

Table altered.

Elapsed: 00:00:00.04

8960000 rows created.

Elapsed: 00:01:19.94
bash-4.2# du -h
1.2G	.
bash-4.2#

4 undo 테이블스페이스 사이즈 확인[편집]

4.1 undo 블럭 디버깅[편집]

5 redo 테이블스페이스 사이즈 확인[편집]

5.1 redo 블럭 디버깅[편집]

6 테이블스페이스 사이즈 확인[편집]

select *
  from dba_tablespaces
  order by 1,2;

select owner,count(*)
  from dba_segments
 where 1=1 -- owner='SYS' 
 group by owner 
 order by 1,2
 ;
 
-- 테이블 생성 
create table dbcafe.TB_T1(A number, B char(1),C varchar2(10))
 tablespace TS_DBCAFE;
   
select * from dbcafe.TB_T1;

-- 세그먼트에는 테이블에 데이터가 입력된적이 없으므로 조회되지 않음. 데이터 입력시 적용됨.
select *
  from dba_segments 
 where segment_name like 'TB_T%'
 ;
 
 
 -- 데이터 1건 입력
INSERT INTO dbcafe.TB_T1 VALUES (1,'1','11111');

-- commit 하지 말고 세그먼트 조회 
select *
  from dba_segments 
 where segment_name like 'TB_T%'
 ;

-- header_file 13
-- header_block 130
-- bytes 65536
-- blocks 8
-- extents 1
-- initial_extent 65536
-- next_extent 1048576
-- relative_fno 13 

select * from dba_data_files where file_id = 13; -- 테이블스페이 데이터파일 번호 // relative_fno 13 
-- [데이터 입력후 아직 커밋하지 않음]
-- 13	130	65536	8	1	65536	1048576 

select * from v$session
where status ='ACTIVE'
;
 
select rowid
     , dbms_rowid.rowid_relative_fno(rowid) as file_no    -- data file number 
     , dbms_rowid.rowid_block_number(rowid) as block_no
from dbcafe.TB_T1 where rownum = 1;

-- block info
-- rowid            file_no block_no
AAAR/wAANAAAACEAAA	13	    132
;

-- 트레이스 파일 식별자 설정 (트레이스파일을 쉽게 찾기 위해서 설정 )
alter session set tracefile_identifier ='DBCAFE_Block_Dump';

alter system dump datafile 13 block 132;

-- 트레이스 폴더로 이동 
cd $ORACE_BASE/diag/rdbms/{mongo/MONGO}/trace -- DB마다 {---} 위치가 다름 

-- 트레이스 파일 찾기 
ls |grep DBCAFE_Block_Dump;

MONGO_ora_43565_DBCAFE_Block_Dump.trc <== 트레이스 파일
MONGO_ora_43565_DBCAFE_Block_Dump.trm <== trace meta file,트레이스파일 메타정보를 보관하는 파일 , adrci같은 툴에서 활용함 

-- 트레이스 파일 열기 
vi MONGO_ora_43565_DBCAFE_Block_Dump.trc



-- 12c 이상 부터는 sql로 조회 가능 

SELECT *
  FROM V$DIAG_TRACE_FILE
 where trace_filename like '%DBCAFE%'
 ORDER BY CHANGE_TIME DESC
;
 
SELECT replace(replace(payload,chr(13)),chr(10)) as payload
  FROM V$DIAG_TRACE_FILE_CONTENTS
 WHERE TRACE_FILENAME = 'MONGO_ora_23904_DBCAFE_Block_Dump.trc'
 ORDER BY LINE_NUMBER
;


Trace file /u01/app/oracle/diag/rdbms/mongo/MONGO/trace/MONGO_ora_23904_DBCAFE_Block_Dump.trc
... 생략 ....
*** 2024-06-23T03:22:44.434510+00:00 (CDB$ROOT(1))
*** SESSION ID:(21.6605) 2024-06-23T03:22:44.434570+00:00
-- 21은 sid 
-- 6605는 serial#
..... 생략 ....

-----------------
Start dump data blocks tsn: 6 file#:13 minblk 132 maxblk 132

-- 1. 버퍼캐시 덤프 
Block dump from cache:
Dump of buffer cache at level 3 for pdb=1 tsn=6 rdba=54526084
BH (0x7cf64db8) file#: 13 rdba: 0x03400084 (13/132) class: 1 ba: 0x7c20a000
  set: 10 pool: 3 bsz: 8192 bsi: 0 sflg: 0 pwc: 0,0
  dbwrid: 0 obj: 73712 objn: 73712 tsn: [1/6] afn: 13 hint: f
  hash: [0x75181db8,0x75181db8] lru: [0x9afaa2c0,0x8cf53998]
  ckptq: [NULL] fileq: [NULL]
  objq: [0x6667add0,0x6667add0] objaq: [0x6667adc0,0x6667adc0]
  st: XCURRENT md: NULL fpin: 'ktspbwh2: ktspfmdb' fscn: 0x273bb5 tch: 2
  flags: block_written_once
  LRBA: [0x0.0.0] LSCN: [0x0] HSCN: [0x273bb5] HSUB: [3]
  Printing buffer operation history (latest change first):
  cnt: 3
  01. sid:00 L192:kcbbic2:bic:FBD     02. sid:00 L191:kcbbic2:bic:FBW   
  03. sid:00 L602:bic1_int:bis:FWC    04. sid:00 L822:bic1_int:ent:rtn  
  05. sid:00 L832:oswmqbg1:clr:WRT    06. sid:00 L930:kubc:sw:mq        
  07. sid:00 L913:bxsv:sw:objq        08. sid:00 L608:bxsv:bis:FBW      
  09. sid:00 L607:bxsv:bis:FFW        10. sid:05 L464:chg1_mn:bic:FMS   
  11. sid:05 L778:chg1_mn:bis:FMS     12. sid:05 L353:gcur:set:MEXCL    
  13. sid:05 L464:chg1_mn:bic:FMS     14. sid:05 L614:chg1_mn:bis:FBD   
  15. sid:05 L922:klbc:sw:cq          16. sid:05 L778:chg1_mn:bis:FMS   
  buffer tsn: 6 rdba: 0x03400084 (13/132)
  scn: 0x273bb5 seq: 0x03 flg: 0x04 tail: 0x3bb50603
  frmt: 0x02 chkval: 0x0e55 type: 0x06=trans data
Hex dump of block: st=0, typ_found=1
Dump of memory from 0x000000007C20A000 to 0x000000007C20C000
........... 생략 ..............

-- 블럭 헤더 덤프 
-- Itl 로우 입력한 트랜젝션 이 itl 0x01 슬롯에 저장됨 , 0x01은 1번째 
select xidusn,xidslot,xidsqn from v$transaction
where addr = (select taddr from v$session where sid = 21);

-- 세션 정보 조회는 TM 락  
SELECT A.SID
     , A.SERIAL#
     , C.object_name
     , A.SID || ', ' || A.SERIAL# AS KILL_TASK
  FROM V$SESSION A
 INNER JOIN V$LOCK B
    ON A.SID = B.SID
 INNER JOIN DBA_OBJECTS C
    ON B.ID1 = C.OBJECT_ID
 WHERE B.TYPE  = 'TM'
 ;
 

-- xidusn   xidslot xidsqn
    4       8       1059
-- 16진수 -> 10진수로 변환
    4       8       4185
;

-- 16진수 -> 10진수로 변환
select to_number('1059', 'xxxx') from dual; 
;
-- 10진수 -> 16진수로 변환
select to_char(1059, 'xxxx') from dual; 
;

Block header dump:  0x03400084
 Object id on Block? Y
 seg/obj: 0x11ff0  csc:  0x0000000000273bb5  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x3400080 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0004.008.00000423  0x01000614.017b.1f  ----    1  fsc 0x0000.00000000
0x02   0x0000.000.00000000  0x00000000.0000.00  ----    0  fsc 0x0000.00000000
bdba: 0x03400084
data_block_dump,data header at 0x7c20a064
===============
tsiz: 0x1f98
hsiz: 0x14
pbl: 0x7c20a064
     76543210
flag=--------
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0x1f8a
avsp=0x1f76
tosp=0x1f76
0xe:pti[0]	nrow=1	offs=0
0x12:pri[0]	offs=0x1f8a
block_row_dump:
tab 0, row 0, @0x1f8a
tl: 14 fb: --H-FL-- lb: 0x1  cc: 3
col  0: [ 2]  c1 02
col  1: [ 1]  31
col  2: [ 5]  31 31 31 31 31
end_of_block_dump
Block dump from disk:
buffer tsn: 6 rdba: 0x03400084 (13/132)
scn: 0x273bb5 seq: 0x03 flg: 0x04 tail: 0x3bb50603
frmt: 0x02 chkval: 0x0e55 type: 0x06=trans data
Hex dump of block: st=0, typ_found=1
Dump of memory from 0x00007F628C33A000 to 0x00007F628C33C000
........... 생략  ............

-- commit;

 
select rowid
         , dbms_rowid.rowid_relative_fno(rowid) as file_no
         , dbms_rowid.rowid_block_number(rowid) as block_no
from dbcafe.TB_T1 where rownum = 1;

6.1 블럭 디버깅[편집]

-- trace file 구분자 입력 
alter session set tracefile_identifier = 'DBCAFE';

-- sql 실행  
SQL> @core_demo_02.sql
6.1.1 trace file 분석[편집]
---------------------------
-- session info 
*** SESSION ID:(395.49059) 2024-06-24T13:04:35.468088+00:00
6.1.2 Block dump from cache[편집]
Start dump data blocks tsn: 0 file#:1 minblk 443673 maxblk 443673
Block dump from cache:
Dump of buffer cache at level 3 for pdb=1 tsn=0 rdba=4637977
BH (0xb1f596e8) file#: 1 rdba: 0x0046c519 (1/443673) class: 1 ba: 0xb1106000
  set: 11 pool: 3 bsz: 8192 bsi: 0 sflg: 0 pwc: 0,0
  dbwrid: 0 obj: 73789 objn: 73789 tsn: [1/0] afn: 1 hint: f
  hash: [0x9ff8d278,0x752a2038] lru: [0xb9fbc740,0xaefe2990]
  ckptq: [NULL] fileq: [NULL]
  objq: [0x6ccce6b8,0x6ccce6b8] objaq: [0x6ccce6a8,0x6ccce6a8]
  st: XCURRENT md: NULL fpin: 'kdswh11: kdst_fetch' fscn: 0x28c8fa tch: 1
  flags: only_sequential_access
  LRBA: [0x0.0.0] LSCN: [0x0] HSCN: [0x0] HSUB: [65535]
  Printing buffer operation history (latest change first):
  cnt: 3
  01. sid:11 L338:zibmlt:set:MSHR     02. sid:11 L144:zibmlt:mk:EXCL    
  03. sid:11 L122:zgb:set:st          04. sid:11 L830:olq1:clr:WRT+CKT  
  05. sid:11 L951:zgb:lnk:objq        06. sid:11 L372:zgb:set:MEXCL     
  07. sid:11 L123:zgb:no:FEN          08. sid:11 L083:zgb:ent:fn        
  09. sid:11 L154:z_sw_cur:bic:FPB    10. sid:11 L940:z_sw_cur:sw:cq    
  11. sid:11 L070:zswcu:ent:ob        12. sid:11 L471:bpostapl:bic:FMS  
  13. sid:11 L786:pre_apl:bis:FMS     14. sid:11 L353:gcur:set:MEXCL    
  15. sid:11 L471:bpostapl:bic:FMS    16. sid:11 L786:pre_apl:bis:FMS   
  buffer tsn: 0 rdba: 0x0046c519 (1/443673)
  scn: 0x28c8f2 seq: 0x02 flg: 0x04 tail: 0xc8f20602
  frmt: 0x02 chkval: 0x9c7f type: 0x06=trans data
Hex dump of block: st=0, typ_found=1
Dump of memory from 0x00000000B1106000 to 0x00000000B1108000

..... 생략 ......
6.1.3 Block header dump[편집]
Block header dump:  0x03400084
 Object id on Block? Y
 seg/obj: 0x11ff0  csc:  0x0000000000273bb5  itc: 2  flg: E  typ: 1 - DATA
     brn: 0  bdba: 0x3400080 ver: 0x01 opc: 0
     inc: 0  exflg: 0
 
 Itl           Xid                  Uba         Flag  Lck        Scn/Fsc
0x01   0x0004.008.00000423  0x01000614.017b.1f  ----    1  fsc 0x0000.00000000
0x02   0x0000.000.00000000  0x00000000.0000.00  ----    0  fsc 0x0000.00000000
bdba: 0x03400084
data_block_dump,data header at 0x7c20a064
===============
tsiz: 0x1f98
hsiz: 0x14
pbl: 0x7c20a064
     76543210
flag=--------
ntab=1
nrow=1
frre=-1
fsbo=0x14
fseo=0x1f8a
avsp=0x1f76
tosp=0x1f76
0xe:pti[0]	nrow=1	offs=0
0x12:pri[0]	offs=0x1f8a
block_row_dump:
tab 0, row 0, @0x1f8a
tl: 14 fb: --H-FL-- lb: 0x1  cc: 3
col  0: [ 2]  c1 02
col  1: [ 1]  31
col  2: [ 5]  31 31 31 31 31
end_of_block_dump
Block dump from disk:
buffer tsn: 6 rdba: 0x03400084 (13/132)
scn: 0x273bb5 seq: 0x03 flg: 0x04 tail: 0x3bb50603
frmt: 0x02 chkval: 0x0e55 type: 0x06=trans data
Hex dump of block: st=0, typ_found=1
Dump of memory from 0x00007F628C33A000 to 0x00007F628C33C000
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