Oracle無法自動排程DBMS_JOB&DBMS_SCHEDULER案例分析
故障描述
某次,一套執行已經有點歲月的 O racle 11 g R2 單機環境,使用者反饋某個物化檢視不會定時自動重新整理,進一步瞭解後,確認是 D BMS_JOB 無法按照指定的時間和間隔執行,根據以往的運維經驗,估計大機率是觸發 J OB 自動執行的條件不具備導致,該問題是比較容易處理。但實際情況並沒有想的那麼簡單,詳情如下。
根因分析
1 、對異常 2 17 J OB 初步分析與處理
建立多個物化檢視,但沒有一個能定時自動觸發
選擇 2 17 號 J OB ,修改其下一次執行時間和間隔
修改 2 17 JOB 下一次執行時間 next_date
begin dbms_job.next_date(217,to_date('2022-12-07 17:35:00','yyyy-mm-dd hh24:mi:ss')); commit; end; /
修改 2 17 JOB 執行間隔 interval
begin dbms_job.interval(217,interval => 'sysdate+10/1440'); commit; end; /
刪除 2 17 JOB ,並重建
exec dbms_job.remove(217); commit; declare job2 number; begin dbms_job.submit(job2,'dbms_mview.refresh(''"PMS"."MV_HEX_PMS_USER_XBRL"'');',sysdate,'sysdate+10/1440'); commit; end; /
重建之後的 2 19 號 J OB 依舊沒有執行
select job, what, last_date, next_date, interval, broken, failures, schema_user, log_user, priv_user from dba_jobs WHERE JOB = 219;
2 、模擬使用者場景,在測試環境上進行驗證
建立業務表 znfx_agg_zc_GT_bb
create table xuh.znfx_agg_zc_GT_bb( MONTHID varchar2(20), ZCZT varchar2(20), QYLX varchar2(20), CLRQ varchar2(20), SFXS varchar2(20), NUM number(20) , ZCZB number(20) , COUNT number(20) , NUM_CNT number(20) , ZCZB_CNT number(20) );
建立儲存過程 znfx_tab_pro
create or replace procedure xuh.znfx_tab_pro(arg1 in varchar2) is v_count number := 1; begin while v_count <= 10000 loop insert into xuh.znfx_agg_zc_GT_bb values (arg1, 'AAA', 'BBB', 'CCC', 'DDD', v_count, v_count, v_count, v_count, v_count); v_count := v_count + 1; end loop; commit; end; /
執行儲存過程,模擬資料插入
SQL> exec xuh.znfx_tab_pro('202212');
建立物化檢視 JCD_AGG_ZC_GT_BB_MV
CREATE MATERIALIZED VIEW "XUH"."JCD_AGG_ZC_GT_BB_MV" ("MONTHID", "ZCZT", "QYLX", "CLRQ", "SFXS", "NUM", "ZCZB", "COUNT", "NUM_CNT", "ZCZB_CNT") REFRESH force ON DEMAND AS select monthid, zczt, qylx, clrq, sfxs, sum(num) num, sum(zczb) zczb, count(*) count, Count(num) num_cnt, Count(zczb) zczb_cnt from xuh.znfx_agg_zc_GT_bb group by monthid, zczt, qylx, clrq, sfxs;
手動執行物化檢視重新整理,確保重新整理沒有問題
SQL> exec dbms_mview.refresh('XUH.JCD_AGG_ZC_GT_BB_MV');
建立 J OB ,並跟蹤觀察 J OB 執行情況
declare job3 number; begin dbms_job.submit(job3,'dbms_mview.refresh(''"XUH"."JCD_AGG_ZC_GT_BB_MV"'');',sysdate,'sysdate+1/1440'); commit; end; /
可以看到該 J OB 確實可以定時自動成功執行
3 、排查可能造成 J OB 無法定時自動執行的原因
Check the most common reasons why jobs don't execute automatically and as scheduled: 1) Instance in RESTRICTED SESSIONS mode? Check if the instance is in restricted sessions mode: select instance_name,logins from v$instance; If logins=RESTRICTED, then: alter system disable restricted session; ^-- Checked! 2) JOB_QUEUE_PROCESSES=0 Make sure that job_queue_processes is > 0 show parameter job_queue_processes ^-- Checked! 3) _SYSTEM_TRIG_ENABLED=FALSE Check if _system_enabled_trigger=false col parameter format a25 col value format a15 select a.ksppinm parameter,b.ksppstvl value from x$ksppi a,x$ksppcv b where a.indx=b.indx and ksppinm='_system_trig_enabled'; If _system_trig_enabled=false, then alter system set "_system_trig_enabled"=TRUE scope=both; ^-- Checked! 4) Is the job BROKEN? select job,broken from dba_jobs where job=<job_number>; If broken, then check the alert log and trace files to diagnose the issue. ^-- Checked! The job is not broken. 5) Is the job COMMITted? Make sure a commit is issued after submitting the job: DECLARE X NUMBER; BEGIN SYS.DBMS_JOB.SUBMIT ( job => X ,what => 'dbms_utility.analyze_schema (''SCOTT'',''COMPUTE'',NULL,NULL,NULL);' ,next_date => to_date('08/06/2005 09:35:00','dd/mm/yyyy hh24:mi:ss') ,no_parse => FALSE ); COMMIT; END; / If the job executes fine if forced (i.e., exec dbms_jobs.run(<job_no>);), then likely a commit is missing. ^-- Checked! The job is committed after submission. 6) UPTIME > 497 days Check if the server (machine) has been up for more than 497 days: For SUN, use 'uptime' OS command. If uptime>497 and the jobs do not execute automatically, then you are hitting unpublished bug 3427424 (Jobs may stop running after 497 days uptime) which is fixed in 9206 and A102 ^-- Checked! The server in this case has been up 126 days only 7) DBA_JOBS_RUNNING Check dba_jobs_running to see if the job is still running: select * from dba_jobs_running; ^-- Checked! The job is not running. 8) LAST_DATE and NEXT_DATE Check if the last_date and next_date for the job are proper: select Job,Next_date,Last_date from dba_jobs where job=<job_number>; ^-- NEXT_DATE is proper, however LAST_DATE is null since the job never executes automatically. 9) NEXT_DATE and INTERVAL Check if the Next_date is changing properly as per the interval set in dba_jobs: select Job,Interval,Next_date,Last_date from dba_jobs where job=<job_number>; ^-- This is not possible since the job never gets executed automatically. 10) Toggle value for JOB_QUEUE_PROCESSES Stop and restart CJQ process(es) alter system set job_queue_processes=0 ; --<Wait for some time to ensure CJQ process stopped> alter system set job_queue_processes=4 ; Ref: Bug 2649244 (fixed by: 9015, 9203, 10201) ^-- Done but did not help 11) Check for unsuccessful shutdowns: A shutdown immediate may get canceled because active sessions prevent the database close operation. Please review the alert log for the last two shutdown / startups and the messages: SHUTDOWN: Active sessions prevent database close operation Please refer to Note 434690.1 - Database Jobs Do Not Run After a Failed 'Shutdown Immediate' 12) DBMS_IJOB (non-documented package): Either restart the database or try the following: exec dbms_ijob.set_enabled(true); Ref: Bug 3505718 (Closed, Not a Bug) ^-- Done but did not help 13) Check view DBA_SCHEDULER_GLOBAL_ATTRIBUTE for CURRENT_OPEN_WINDOW: SQL> select * from DBA_SCHEDULER_GLOBAL_ATTRIBUTE where attribute_name='CURRENT_OPEN_WINDOW'; If a window is open close it (e.g.): ATTRIBUTE_NAME VALUE --------------------------------- ---------------------------- CURRENT_OPEN_WINDOW WEEKNIGHT_WINDOW SQL> exec DBMS_SCHEDULER.close_window ('WEEKNIGHT_WINDOW'); ^-- Done but did not help These are the most common causes for this behavior.
透過分析 M OS 文章 Jobs Not Executing Automatically (Doc ID 313102.1) , 檢查所有的可能原因,並根據官方建議調整,但是問題依舊。此時,想短時間透過 D BMS_JOB 方式解決問題不太現實,因此嘗試使用高版本官方建議的 DBMS_SCHEDULER ,確認可行性。
4 、使用 DBMS_SCHEDULER 建立任務,觀察任務執行情況
建立 J OB2 ,並立即執行
BEGIN DBMS_SCHEDULER.CREATE_JOB( job_name => 'job2', job_type => 'PLSQL_BLOCK', job_action => 'dbms_mview.refresh(''"PMS"."MV_HEX_PMS_USER_XBRL"'');', start_date => SYSDATE, repeat_interval => 'FREQ = MINUTELY; INTERVAL = 10', enabled => true); END; /
檢查 DBA_SCHEDULER_JOBS 字典檢視,發現任務沒有自動執行
select OWNER, JOB_NAME, ENABLED, to_char(START_DATE, 'yyyy-mm-dd hh24:mi:ss') START_DATE, REPEAT_INTERVAL, RUN_COUNT, to_char(LAST_START_DATE, 'yyyy-mm-dd hh24:mi:ss') LAST_START_DATE, to_char(LAST_RUN_DURATION, 'yyyy-mm-dd hh24:mi:ss') LAST_RUN_DURATION, to_char(NEXT_RUN_DATE, 'yyyy-mm-dd hh24:mi:ss') NEXT_RUN_DATE from DBA_SCHEDULER_JOBS where job_name = 'JOB2'; [object Object]
select * from dba_scheduler_job_log t where owner='PMS' and job_name='JOB2';
5 、建立測試任務 test _job ,並重啟 D BMS_JOB& DBMS_SCHEDULER 屬性
建立測試 test_job 任務
begin dbms_scheduler.create_job ( job_name => 'test_job', job_type => 'plsql_block', job_action => 'null;', start_date => SYSDATE, repeat_interval => 'FREQ = MINUTELY; INTERVAL = 1', enabled => true); end; /
檢查 D BMS_JOB& DBMS_SCHEDULER 屬性生效情況
select value from dba_scheduler_global_attribute where attribute_name='SCHEDULER_DISABLED'; 未選定行 SQL> oradebug setmypid SQL> oradebug dumpvar sga kkjsre sword kkjsre_ [060040500, 060040504) = 00000001
先禁用任務屬性,再重新觸發生效
exec dbms_ijob.set_enabled(FALSE); exec dbms_ijob.set_enabled(TRUE); alter system set job_queue_processes=0; alter system set job_queue_processes=500; --使用者環境重啟DBMS_SCHEDULER屬性報錯分析 exec dbms_scheduler.set_scheduler_attribute('SCHEDULER_DISABLED', 'TRUE'); --exec dbms_scheduler.set_scheduler_attribute('SCHEDULER_DISABLED', 'FALSE');
關閉 DBMS_SCHEDULER.SET_SCHEDULER_ATTRIBUTE 屬性,命中 O RA-1033 報錯
透過分析 M OS 文章 DBMS_SCHEDULER.SET_SCHEDULER_ATTRIBUTE Failing With ORA-01033. (Doc ID 756740.1) ,官方未給出明確的故障原因,等待一會之後重試成功,同時觀測到 DBMS_SCHEDULER 建立的任務正常定時自動執行。
這跟其他執行正常的 Oracle 相比有些異常,甚至是相反,但不排除是這套環境自身的原因,甚至是 B UG 。其實,官方原文中也有提到 Oracle 文件, 並 沒有支援完全禁用排程器的方法 ,只是確保在升級模式下,自動任務不會執行。
此時檢查任務 test_job 執行情況,發現該任務已經在自動排程了
select OWNER, JOB_NAME, ENABLED, to_char(START_DATE, 'yyyy-mm-dd hh24:mi:ss') START_DATE, REPEAT_INTERVAL, RUN_COUNT, to_char(LAST_START_DATE, 'yyyy-mm-dd hh24:mi:ss') LAST_START_DATE, to_char(LAST_RUN_DURATION, 'yyyy-mm-dd hh24:mi:ss') LAST_RUN_DURATION, to_char(NEXT_RUN_DATE, 'yyyy-mm-dd hh24:mi:ss') NEXT_RUN_DATE from DBA_SCHEDULER_JOBS where job_name = 'TEST_JOB';
同理,此時業務任務 job 2 ,同樣已經在自動排程了,如下:
select OWNER, JOB_NAME, ENABLED, to_char(START_DATE, 'yyyy-mm-dd hh24:mi:ss') START_DATE, REPEAT_INTERVAL, RUN_COUNT, to_char(LAST_START_DATE, 'yyyy-mm-dd hh24:mi:ss') LAST_START_DATE, to_char(LAST_RUN_DURATION, 'yyyy-mm-dd hh24:mi:ss') LAST_RUN_DURATION, to_char(NEXT_RUN_DATE, 'yyyy-mm-dd hh24:mi:ss') NEXT_RUN_DATE from DBA_SCHEDULER_JOBS where job_name = 'JOB2';
select * from dba_scheduler_job_log t where owner='PMS' and job_name='JOB2';
解決辦法
SQL> exec dbms_scheduler.set_scheduler_attribute('SCHEDULER_DISABLED', 'TRUE');
來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/30310891/viewspace-2927280/,如需轉載,請註明出處,否則將追究法律責任。
相關文章
- Oracle RAC 利用RMAN自動排程備份Oracle
- 故障分析 | redis cluster 從庫無法自動恢復同步案例一則Redis
- 程式排程案例分析與常見疑惑1:為何不能排程?
- Oracle Windows平臺自動排程備份指令碼OracleWindows指令碼
- Oracle中job無法自動執行Oracle
- Go runtime 排程器精講(七):案例分析Go
- 一則資料庫無法啟動的奇怪案例分析資料庫
- 快速部署crontab自動排程任務
- 設定vimrc檔案例如:顯示行號,語法高亮,自動縮排
- Linux核心排程分析(程式排程)Linux
- Oracle日常問題-資料庫無法啟動(案例二)Oracle資料庫
- Oracle 11.2.0.4 awr過期快照無法自動清理Oracle
- Oracle 11g無法自動收集統計資訊Oracle
- oracle延遲事務無法自動推入處理Oracle
- 一次Oracle監聽無法動態註冊處理過程排查分析Oracle
- Oracle事件驅動的排程作業Oracle事件
- 【freertos】005-啟動排程器分析
- 需求分析案例 - “自動註冊”功能
- springboot 自動配置案例分析Spring Boot
- linux下dbstart,dbshut無法執行和自動啟動Oracle的辦法LinuxOracle
- PostgreSQLrotatetable自動清理排程-約束,觸發器SQL觸發器
- Oracle lsnrctl 無法啟動Oracle
- 動態網頁 —— 逆向分析法 + 案例網頁
- Go語言排程器之主動排程(20)Go
- 幾種常見MySQL無法啟動案例MySql
- Oracle Rac crs無法啟動Oracle
- oracle偵聽無法啟動Oracle
- 基於事件驅動的Oracle作業排程事件Oracle
- 一則資料庫無法重啟的案例分析資料庫
- TSM ORACLE 備份排程Oracle
- [典藏版] Golang 排程器 GMP 原理與排程全分析Golang
- ORA-27492 無法執行作業,排程程式不可用
- Tivoli 客戶機排程自動執行設定
- Flink排程之排程器、排程策略、排程模式模式
- 百度自動內網流量排程進階實戰內網
- 淺談APS生產排程在自動化排產考慮的約束
- ORACLE windows驅動磁碟機代號自動變更導致oracle資料庫崩潰無法啟動OracleWindows資料庫
- html網頁無法自動播放音樂HTML網頁