SRDC - ORA-1555 during Export: Checklist of Evidence to Supply (Doc ID 1682706.1)
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SRDC - ORA-1555 during Export: Checklist of Evidence to Supply (Doc ID 1682706.1)
Action Plan
1. Execute srdc_db_undo_1555-1.sql as sysdba and collect the spool output. 以sysdba身份执行
--srdc_db_undo_1555-1.sql REM srdc_db_undo_1555-1.sql REM collect collect Undo parameters and Segments details. define SRDCNAME=‘DB_Undo_1555-1‘ set pagesize 200 verify off sqlprompt "" term off entmap off echo off set markup html on spool on COLUMN SRDCSPOOLNAME NOPRINT NEW_VALUE SRDCSPOOLNAME select ‘SRDC_‘||upper(‘&&SRDCNAME‘)||‘_‘||upper(instance_name)||‘_‘|| to_char(sysdate,‘YYYYMMDD_HH24MISS‘) SRDCSPOOLNAME from v$instance; spool &&SRDCSPOOLNAME..htm select ‘Diagnostic-Name : ‘ "Diagnostic-Name ", ‘&&SRDCNAME‘ "Report Info" from dual union all select ‘Time : ‘ , to_char(systimestamp, ‘YYYY-MM-DD HH24MISS TZHTZM‘ ) from dual union all select ‘Machine : ‘ , host_name from v$instance union all select ‘Version : ‘,version from v$instance union all select ‘DBName : ‘,name from v$database union all select ‘Instance : ‘,instance_name from v$instance / set echo on --***********************Undo Extents breakdown information*********************** select status, count(*) cnt from dba_rollback_segs group by status / col segment_name format a30 head "Segment Name" col "ACT BYTES" format 999,999,999,999 head "Active Bytes" col "UNEXP BYTES" format 999,999,999,999 head "Unexpired Bytes" col "EXP BYTES" format 999,999,999,999 head "Expired Bytes" select segment_name, nvl(sum(act),0) "ACT BYTES", nvl(sum(unexp),0) "UNEXP BYTES", nvl(sum(exp),0) "EXP BYTES" from (select segment_name, nvl(sum(bytes),0) act,00 unexp, 00 exp from dba_undo_extents where status=‘ACTIVE‘ group by segment_name union select segment_name, 00 act, nvl(sum(bytes),0) unexp, 00 exp from dba_undo_extents where status=‘UNEXPIRED‘ group by segment_name union select segment_name, 00 act, 00 unexp, nvl(sum(bytes),0) exp from dba_undo_extents where status=‘EXPIRED‘ group by segment_name) group by segment_name order by 1 / select distinct status st, count(*) "HOW MANY", sum(bytes) "SIZE" from dba_undo_extents group by status / select SEGMENT_NAME, TABLESPACE_NAME, EXTENT_ID, FILE_ID, BLOCK_ID, BYTES, BLOCKS, STATUS from dba_undo_extents order by 1,3,4,5 / ---***********************Undo Extents Contention breakdown*********************** -- Take out column TUNED_UNDORETENTION if customer -- prior to 10.2.x -- -- The time frame can be adjusted with this query -- By default using around 4 hour window of time -- -- Ex. -- Using sysdate-.04 looking at the last hour -- Using sysdate-.1 looking at the last 4 hours -- Using sysdate-.32 looking at the last 8 hours -- Using sysdate-1 looking at the last 24 hours select inst_id, to_char(begin_time,‘MM/DD/YYYY HH24:MI‘) begin_time, UNXPSTEALCNT, EXPSTEALCNT , SSOLDERRCNT, NOSPACEERRCNT, MAXQUERYLEN, TUNED_UNDORETENTION, TUNED_UNDORETENTION/60/60 hours from gv$undostat where begin_time between (sysdate-.1) and sysdate order by inst_id, begin_time / set echo off set sqlprompt "SQL> " term on set verify on spool off set markup html off spool off set echo on
2. Check the Undo Configuration recommendation using script srdc_undo_recommendation_10g.sql (version 10g onwards), or srdc_undo_recommendation_9i.sql (till version 9i). Collect the spool output.
2. 使用脚本srdc_undo_recommendation_10g.sql (版本10g起)或 srdc_undo_recommendation_9i.sql (版本9i)检查“Undo配置”建议
--srdc_undo_recommendation_10g.sql REM srdc_undo_recommendation_10g.sql REM check the current undo configuration and provides recommendation based on the previous workload.. define SRDCNAME=‘DB_Undo_Recommendation_10g‘ set pagesize 200 verify off sqlprompt "" term off entmap off echo off set markup html on spool on COLUMN SRDCSPOOLNAME NOPRINT NEW_VALUE SRDCSPOOLNAME select ‘SRDC_‘||upper(‘&&SRDCNAME‘)||‘_‘||upper(instance_name)||‘_‘|| to_char(sysdate,‘YYYYMMDD_HH24MISS‘) SRDCSPOOLNAME from v$instance; spool &&SRDCSPOOLNAME..htm select ‘Diagnostic-Name ‘ "Diagnostic-Name ", ‘&&SRDCNAME‘ "Report Info" from dual union all select ‘Time ‘ , to_char(systimestamp, ‘YYYY-MM-DD HH24MISS TZHTZM‘ ) from dual union all select ‘Machine ‘ , host_name from v$instance union all select ‘Version ‘,version from v$instance union all select ‘DBName ‘,name from v$database union all select ‘Instance ‘,instance_name from v$instance / SET SERVEROUTPUT ON SET LINES 600 ALTER SESSION SET NLS_DATE_FORMAT = ‘DD/MM/YYYY HH24:MI:SS‘; DECLARE v_analyse_start_time DATE := SYSDATE - 7; v_analyse_end_time DATE := SYSDATE; v_cur_dt DATE; v_undo_info_ret BOOLEAN; v_cur_undo_mb NUMBER; v_undo_tbs_name VARCHAR2(100); v_undo_tbs_size NUMBER; v_undo_autoext BOOLEAN; v_undo_retention NUMBER(5); v_undo_guarantee BOOLEAN; v_instance_number NUMBER; v_undo_advisor_advice VARCHAR2(100); v_undo_health_ret NUMBER; v_problem VARCHAR2(1000); v_recommendation VARCHAR2(1000); v_rationale VARCHAR2(1000); v_retention NUMBER; v_utbsize NUMBER; v_best_retention NUMBER; v_longest_query NUMBER; v_required_retention NUMBER; BEGIN select sysdate into v_cur_dt from dual; DBMS_OUTPUT.PUT_LINE(CHR(9)); DBMS_OUTPUT.PUT_LINE(‘- Undo Analysis started at : ‘ || v_cur_dt || ‘ -‘); DBMS_OUTPUT.PUT_LINE(‘--------------------------------------------------‘); v_undo_info_ret := DBMS_UNDO_ADV.UNDO_INFO(v_undo_tbs_name, v_undo_tbs_size, v_undo_autoext, v_undo_retention, v_undo_guarantee); select sum(bytes)/1024/1024 into v_cur_undo_mb from dba_data_files where tablespace_name = v_undo_tbs_name; DBMS_OUTPUT.PUT_LINE(‘NOTE:The following analysis is based upon the database workload during the period -‘); DBMS_OUTPUT.PUT_LINE(‘Begin Time : ‘ || v_analyse_start_time); DBMS_OUTPUT.PUT_LINE(‘End Time : ‘ || v_analyse_end_time); DBMS_OUTPUT.PUT_LINE(CHR(9)); DBMS_OUTPUT.PUT_LINE(‘Current Undo Configuration‘); DBMS_OUTPUT.PUT_LINE(‘--------------------------‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo tablespace‘,55) || ‘ : ‘ || v_undo_tbs_name); DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo tablespace size (datafile size now) ‘,55) || ‘ : ‘ || v_cur_undo_mb || ‘M‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo tablespace size (consider autoextend) ‘,55) || ‘ : ‘ || v_undo_tbs_size || ‘M‘); IF V_UNDO_AUTOEXT THEN DBMS_OUTPUT.PUT_LINE(RPAD(‘AUTOEXTEND for undo tablespace is‘,55) || ‘ : ON‘); ELSE DBMS_OUTPUT.PUT_LINE(RPAD(‘AUTOEXTEND for undo tablespace is‘,55) || ‘ : OFF‘); END IF; DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo retention‘,55) || ‘ : ‘ || v_undo_retention); IF v_undo_guarantee THEN DBMS_OUTPUT.PUT_LINE(RPAD(‘UNDO GUARANTEE is set to‘,55) || ‘ : TRUE‘); ELSE dbms_output.put_line(RPAD(‘UNDO GUARANTEE is set to‘,55) || ‘ : FALSE‘); END IF; DBMS_OUTPUT.PUT_LINE(CHR(9)); SELECT instance_number INTO v_instance_number FROM V$INSTANCE; DBMS_OUTPUT.PUT_LINE(‘Undo Advisor Summary‘); DBMS_OUTPUT.PUT_LINE(‘---------------------------‘); v_undo_advisor_advice := dbms_undo_adv.undo_advisor(v_analyse_start_time, v_analyse_end_time, v_instance_number); DBMS_OUTPUT.PUT_LINE(v_undo_advisor_advice); DBMS_OUTPUT.PUT_LINE(CHR(9)); DBMS_OUTPUT.PUT_LINE(‘Undo Space Recommendation‘); DBMS_OUTPUT.PUT_LINE(‘-------------------------‘); v_undo_health_ret := dbms_undo_adv.undo_health(v_analyse_start_time, v_analyse_end_time, v_problem, v_recommendation, v_rationale, v_retention, v_utbsize); IF v_undo_health_ret > 0 THEN DBMS_OUTPUT.PUT_LINE(‘Minimum Recommendation : ‘ || v_recommendation); DBMS_OUTPUT.PUT_LINE(‘Rationale : ‘ || v_rationale); DBMS_OUTPUT.PUT_LINE(‘Recommended Undo Tablespace Size : ‘ || v_utbsize || ‘M‘); ELSE DBMS_OUTPUT.PUT_LINE(‘Allocated undo space is sufficient for the current workload.‘); END IF; SELECT dbms_undo_adv.best_possible_retention(v_analyse_start_time, v_analyse_end_time) into v_best_retention FROM dual; SELECT dbms_undo_adv.longest_query(v_analyse_start_time, v_analyse_end_time) into v_longest_query FROM dual; SELECT dbms_undo_adv.required_retention(v_analyse_start_time, v_analyse_end_time) into v_required_retention FROM dual; DBMS_OUTPUT.PUT_LINE(CHR(9)); DBMS_OUTPUT.PUT_LINE(‘Retention Recommendation‘); DBMS_OUTPUT.PUT_LINE(‘------------------------‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘The best possible retention with current configuration is ‘,60) || ‘ : ‘ || v_best_retention || ‘ Seconds‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘The longest running query ran for ‘,60) || ‘ : ‘ || v_longest_query || ‘ Seconds‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘The undo retention required to avoid errors is ‘,60) || ‘ : ‘ || v_required_retention || ‘ Seconds‘); END; / set echo off set sqlprompt "SQL> " term on set verify on set markup html off PROMPT PROMPT PROMPT REPORT GENERATED : &SRDCSPOOLNAME..htm set verify on echo on
--srdc_undo_recommendation_9i.sql REM srdc_undo_recommendation_9i.sql REM check the current undo configuration and provides recommendation based on the previous workload.. define SRDCNAME=‘DB_Undo_Recommendation_9i‘ set pagesize 200 verify off sqlprompt "" term off entmap off echo off set markup html on spool on COLUMN SRDCSPOOLNAME NOPRINT NEW_VALUE SRDCSPOOLNAME select ‘SRDC_‘||upper(‘&&SRDCNAME‘)||‘_‘||upper(instance_name)||‘_‘|| to_char(sysdate,‘YYYYMMDD_HH24MISS‘) SRDCSPOOLNAME from v$instance; spool &&SRDCSPOOLNAME..htm select ‘Diagnostic-Name ‘ "Diagnostic-Name ", ‘&&SRDCNAME‘ "Report Info" from dual union all select ‘Time ‘ , to_char(systimestamp, ‘YYYY-MM-DD HH24MISS TZHTZM‘ ) from dual union all select ‘Machine ‘ , host_name from v$instance union all select ‘Version ‘,version from v$instance union all select ‘DBName ‘,name from v$database union all select ‘Instance ‘,instance_name from v$instance / SET SERVEROUTPUT ON SET LINES 600 ALTER SESSION SET NLS_DATE_FORMAT = ‘DD/MM/YYYY HH24:MI:SS‘; DECLARE v_begin_time varchar2(30); v_end_time varchar2(30); v_max_qry_len number; v_unto_tbs varchar2(100); v_cur_undo_ret varchar2(100); v_cur_undo_mb number; v_undo_autoext varchar2(5); v_cur_dt date; v_recommended_undo_mb number; v_analyse_start_time date; v_analyse_end_time date; BEGIN select sysdate into v_cur_dt from dual; select sysdate into v_cur_dt from dual; DBMS_OUTPUT.PUT_LINE(CHR(10)); DBMS_OUTPUT.PUT_LINE(‘--------------------------------------------------‘); DBMS_OUTPUT.PUT_LINE(‘- Undo Analysis started at : ‘ || v_cur_dt || ‘ -‘); DBMS_OUTPUT.PUT_LINE(‘--------------------------------------------------‘); select min(BEGIN_TIME), max(end_time) into v_begin_time, v_end_time from v$undostat; select max(MAXQUERYLEN) into v_max_qry_len from v$undostat; select value into v_cur_undo_ret from v$parameter where name = ‘undo_retention‘; select value into v_unto_tbs from v$parameter where name = ‘undo_tablespace‘; SELECT ROUND((UR * (UPS * DBS))/1024/1024) INTO v_recommended_undo_mb FROM ( select max(MAXQUERYLEN) UR from v$undostat) , (SELECT undoblks/((end_time-begin_time)*86400) AS UPS FROM v$undostat WHERE undoblks = (SELECT MAX(undoblks) FROM v$undostat)), (SELECT block_size AS DBS FROM dba_tablespaces WHERE tablespace_name = (SELECT UPPER(value) FROM v$parameter WHERE name = ‘undo_tablespace‘)); select sum(bytes)/1024/1024 into v_cur_undo_mb from dba_data_files where tablespace_name = v_unto_tbs; SELECT CASE(select count(*) from dba_data_files where tablespace_name = v_unto_tbs and autoextensible = ‘YES‘) WHEN 0 THEN ‘OFF‘ ELSE ‘ON‘ END into v_undo_autoext from dual; DBMS_OUTPUT.PUT_LINE(CHR(10)); DBMS_OUTPUT.PUT_LINE(‘----‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Longest running query ran for : ‘,40) || ‘ : ‘ || v_max_qry_len || ‘ Seconds‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo retention is ‘,40) || ‘ : ‘ || v_cur_undo_ret || ‘ Seconds‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Current undo tablespace size is ‘,40) || ‘ : ‘ || v_cur_undo_mb || ‘M‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘AUTOEXTEND for undo tablespace size is ‘,40) || ‘ : ‘ || v_undo_autoext); DBMS_OUTPUT.PUT_LINE(‘----‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Recommended undo retention is ‘,40) || ‘ : ‘ || TO_CHAR(v_max_qry_len+1) || ‘ Seconds‘); DBMS_OUTPUT.PUT_LINE(RPAD(‘Recommended undo tablespace size is ‘,40) || ‘ : ‘ || v_recommended_undo_mb || ‘M‘); select sysdate into v_cur_dt from dual; DBMS_OUTPUT.PUT_LINE(CHR(10)); DBMS_OUTPUT.PUT_LINE(‘----------------------------------------------------‘); DBMS_OUTPUT.PUT_LINE(‘- Undo Analysis completed at : ‘ || v_cur_dt || ‘ -‘); DBMS_OUTPUT.PUT_LINE(‘----------------------------------------------------‘); END; / set echo off set sqlprompt "SQL> " term on set verify on set markup html off PROMPT PROMPT PROMPT REPORT GENERATED : &SRDCSPOOLNAME..htm set verify on echo on
3. If the failing table has LOB columns, check for LOB Corruption using srdc_corrupt_LOB.sql script. Collect the spool output.
3. 如果失败的表具有LOB列,请使用srdc_corrupt_LOB.sql脚本检查LOB损坏
--srdc_corrupt_LOB.sql REM srdc_corrupt_LOB.sql REM To identify corrupted row(s) in a LOB segment define SRDCNAME=‘DB_Corrupt_LOB‘ set pagesize 200 verify off term off entmap off echo off set markup html on spool on COLUMN SRDCSPOOLNAME NOPRINT NEW_VALUE SRDCSPOOLNAME select ‘SRDC_‘||upper(‘&&SRDCNAME‘)||‘_‘||upper(instance_name)||‘_‘|| to_char(sysdate,‘YYYYMMDD_HH24MISS‘) SRDCSPOOLNAME from v$instance; spool &&SRDCSPOOLNAME..htm select ‘Diagnostic-Name : ‘ "Diagnostic-Name ", ‘&&SRDCNAME‘ "Report Info" from dual union all select ‘Time : ‘ , to_char(systimestamp, ‘YYYY-MM-DD HH24MISS TZHTZM‘ ) from dual union all select ‘Machine : ‘ , host_name from v$instance union all select ‘Version : ‘,version from v$instance union all select ‘DBName : ‘,name from v$database union all select ‘Instance : ‘,instance_name from v$instance / set echo on drop table corrupted_lob_data / create table corrupted_lob_data (corrupted_rowid rowid) / set term on ACCEPT table_with_lob CHAR PROMPT ‘Table Name :‘ ACCEPT table_owner CHAR PROMPT ‘Table Owner :‘ ACCEPT lob_column CHAR PROMPT ‘LOB Column Name :‘ set term off set serveroutput on set concat off declare error_1555 exception; pragma exception_init(error_1555,-1555); num number; begin for cursor_lob in (select rowid r, &&lob_column from &&table_owner.&&table_with_lob) loop begin num := dbms_lob.instr (cursor_lob.&&lob_column, hextoraw (‘889911‘)) ; exception when error_1555 then insert into corrupted_lob_data values (cursor_lob.r); commit; end; end loop; end; / --********************Corrupt Data***************** select *from corrupted_lob_data / drop table corrupted_lob_data / spool off set markup html off spool off set term on PROMPT PROMPT PROMPT REPORT GENERATED : &SRDCSPOOLNAME..htm set echo off set sqlprompt "SQL> " term on set verify on set echo on
4. Attach all of the above evidence to the Service Request at SR creation time. The evidence can all be placed into a single ZIP or similar compressed archive or can be attached as separate files.
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