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28.4.1  ÊÖ¹¤Æô¶¯ºÍ¹Ø±ÕOracle·þÎñ
OracleÊý¾Ý¿â·þÎñÓÉÁ½²¿·Ö×é³É£ºÊý¾Ý¿â½ø³ÌºÍÍøÂç¼àÌýÆ÷½ø³Ì£¬ËüÃÇ·Ö±ð¿Éͨ¹ýsqlplusºÍlsnrctlÃüÁî¿ØÖÆÆô¶¯¹Ø±Õ¡£
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oracle  870   1  0 11:54 ?   00:00:00 ora_pmon_orcl  //½ø³Ì¼à¿ØÆ÷½ø³Ì
oracle  872   1  0 11:54 ?   00:00:00 ora_vktm_orcl  //ʱÖÓ¸üнø³Ì
oracle  876   1  0 11:54 ?   00:00:00 ora_diag_orcl  //Êý¾Ý¿âÕï¶Ï½ø³Ì
oracle  878   1  0 11:54 ?   00:00:00 ora_dbrm_orcl  //Êý¾Ý¿â×ÊÔ´¹ÜÀí½ø³Ì
oracle  880   1  0 11:54 ?   00:00:00 ora_psp0_orcl  //½ø³Ì²úÉú
oracle  884   1  0 11:54 ?   00:00:03 ora_dia0_orcl  //ÁíÒ»¸öÊý¾Ý¿âÕï¶Ï½ø³Ì
oracle  886   1  0 11:54 ?   00:00:00 ora_mman_orcl  //Ö´ÐÐÊý¾Ý¿âµÄÄÚ²¿ÈÎÎñ
oracle  888   1  0 11:54 ?   00:00:00 ora_dbw0_orcl  //Êý¾Ý¿âд½ø³Ì
oracle  890   1  0 11:54 ?   00:00:01 ora_lgwr_orcl  //ÈÕÖ¾½ø³Ì
oracle  892   1  0 11:54 ?   00:00:01 ora_ckpt_orcl  //¼ì²éµã½ø³Ì
oracle  894   1  0 11:54 ?   00:00:04 ora_smon_orcl  //ϵͳ¼à¿Ø½ø³Ì
oracle  896   1  0 11:54 ?   00:00:00 ora_reco_orcl 
oracle  898   1  0 11:54 ?   00:00:05 ora_mmon_orcl  //ÊÕ¼¯SQL¶ÔÏóÐÅÏ¢
oracle  900   1  0 11:54 ?   00:00:00 ora_mmnl_orcl  //¸ºÔð½«SGAͳ¼ÆÐÅÏ¢Êä³ö                                                   //µ½Êý¾Ý¿â


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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 th ......

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alter system set job_queue_processes=39 scope=spfile;//×î´óÖµ²»Äܳ¬¹ý1000 ;job_queue_interval = 10 //µ÷¶È×÷ҵˢÐÂÆµÂÊÃëΪµ¥Î»
job_queue_process ±íʾoracleÄܹ»²¢·¢µÄjobµÄÊýÁ¿£¬¿ÉÒÔͨ¹ýÓï¾ä¡¡¡¡
show parameter job_queue_process;
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¡¡¡¡rowÔÚÊý¾Ý¿éÖеĴ洢·½Ê½
¡¡¡¡SELECT ROWID, last_name from hr.employees WHERE department_id = 20;
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