利用外部表实现SQL查询Oracle告警日志Alert.log
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本文根据刘相兵大师的blog的脚本,并做了一些该进:
http://www.oracledatabase12g.com/archives/%E5%88%A9%E7%94%A8%E5%A4%96%E9%83%A8%E8%A1%A8%E5%AE%9E%E7%8E%B0sql%E6%9F%A5%E8%AF%A2oracle%E5%91%8A%E8%AD%A6%E6%97%A5%E5%BF%97alert-log.html
有同学问是否可以用SQL语句直接查询告警日志的内容,即创建一张包含Alert.log内容的表或视图
--drop table alert_log_view;--drop directory bdump;declare path_bdump varchar2(4000); name_alert varchar2(4000); ins_name varchar2(200);begin select value into path_bdump from sys.v_$parameter where name = 'background_dump_dest'; select 'alert_' || value || '.log' into name_alert from sys.v_$parameter where name = 'instance_name'; select value into ins_name from sys.v_$parameter where name = 'instance_number'; if ins_name = '0' then ins_name := ''; end if; execute immediate 'create or replace directory bdump'||ins_name||' as ''' || path_bdump || ''''; execute immediate 'create table ALERT_LOG_VIEW' || ins_name || ' (MSG_line varchar2(4000) ) ' || ' organization external ' || ' (type oracle_loader ' || ' default directory bdump' || ins_name || ' access parameters ( ' || ' records delimited by newline ' || ' nobadfile ' || ' nologfile ' || ' nodiscardfile ' || ' skip 0 ' || ' READSIZE 10485760 ' || ' FIELDS LDRTRIM ' || ' REJECT ROWS WITH ALL NULL FIELDS ' || ' (MSG_LINE (1:1000) CHAR(1000)) ' || ' ) ' || ' location (''' || name_alert || ''') )' || ' reject limit unlimited ' || ' noparallel nomonitoring ';end;/
执行以上PL/SQL代码,会创建名为bdump$SID的目录 和ALERT_LOG_VIEW$SID的外部表(如RAC中的1号实例PROD1,则为ALERT_LOG_VIEW1,单实例single instance则为 ALERT_LOG_VIEW), 需要时直接查询ALERT_LOG_VIEW即可,譬如要从告警信息中找出最近三天ORA-错误的记录:
col lineno noprintcol ora_error noprintcol msg_line format a132set pages 0 lines 300 trimspool on trim onalter session set nls_date_language = 'american';alter session set nls_date_format='dd/mm/yyyy hh24:mi:ss';alter session set sql_trace=false;break on thedatepromptprompt ERROR IN ALERT LOG FILE - LAST 3 DAYSprompt =====================================select "LINENO", "THEDATE", "ORA_ERROR", "MSG_LINE" from (select * from (select lineno, msg_line, thedate, max(case when (ora_error like 'ORA-%' or ora_error like 'PLS-%' or ora_error like 'TNS-%' ) then rtrim(substr(ora_error, 1, instr(ora_error, ' ') - 1), ':') else null end) over(partition by thedate) ora_error from (select lineno, msg_line, max(thedate) over(order by lineno) thedate, lead(msg_line) over(order by lineno) ora_error from (select rownum lineno, substr(msg_line, 1, 132) msg_line, case when msg_line like '___ ___ __ __:__:__ ____' then to_date(msg_line, 'Dy Mon DD hh24:mi:ss yyyy') else null end thedate from ALERT_LOG_VIEW)))) where ora_error is not null and thedate >= (trunc(sysdate) - 3) order by thedate/
实例输出:
10/11/2011 03:15:49 Thu Nov 10 03:15:49 2011 Errors in file /s01/orabase/diag/rdbms/vprod/VPROD1/trace/VPROD1_ora_5547.trc (incident=11105): ORA-00700: soft internal error, arguments: [kgerev1], [600], [600], [700], [], [], [], [], [], [], [], [] Incident details in: /s01/orabase/diag/rdbms/vprod/VPROD1/incident/incdir_11105/VPROD1_ora_5547_i11105.trc Errors in file /s01/orabase/diag/rdbms/vprod/VPROD1/trace/VPROD1_ora_5547.trc (incident=11106): ORA-00600: internal error code, arguments: [], [], [], [], [], [], [], [], [], [], [], [] Incident details in: /s01/orabase/diag/rdbms/vprod/VPROD1/incident/incdir_11106/VPROD1_ora_5547_i11106.trc10/11/2011 03:15:52 Thu Nov 10 03:15:52 2011 Dumping diagnostic data in directory=[cdmp_20111110031552], requested by (instance=1, osid=5547), summary=[incident=11105].
有些情况下,我们的alert_log 是按天来开始备份的,这样我们可以通过下面的脚本,制定某个报警日志文件,来查询这个报警文件备份中的错误信息:
--drop table alert_log_view;--drop directory bdump;declare path_bdump varchar2(4000); name_alert varchar2(4000); ins_name varchar2(200);begin select value into path_bdump from sys.v_$parameter where name = 'background_dump_dest'; select 'alert_' || value || '.log' into name_alert from sys.v_$parameter where name = 'instance_name'; select value into ins_name from sys.v_$parameter where name = 'instance_number'; if ins_name = '0' then ins_name := ''; end if; execute immediate 'create or replace directory bdump'||ins_name||' as ''' || path_bdump || ''''; execute immediate 'drop table alert_log_view'||ins_name||' purge'; execute immediate 'create table ALERT_LOG_VIEW' || ins_name || ' (MSG_line varchar2(4000) ) ' || ' organization external ' || ' (type oracle_loader ' || ' default directory bdump' || ins_name || ' access parameters ( ' || ' records delimited by newline ' || ' nobadfile ' || ' nologfile ' || ' nodiscardfile ' || ' skip 0 ' || ' READSIZE 10485760 ' || ' FIELDS LDRTRIM ' || ' REJECT ROWS WITH ALL NULL FIELDS ' || ' (MSG_LINE (1:1000) CHAR(1000)) ' || ' ) ' || ' location (''&alert_log'') )' || ' reject limit unlimited ' || ' noparallel nomonitoring ';end;/
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- Script:利用外部表实现SQL查询Oracle告警日志Alert.log
- Script:利用外部表实现SQL查询Oracle告警日志Alert.log
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