ORACLE DBAѧϰ±Ê¼Ç ¹ÜÀí¹éµµÈÕÖ¾Îļþ
¹éµµÈÕÖ¾Îļþ£ºÊÇ´¦Óڷǻ£¨INACTIVE£©µÄ״̬µÄÖØ×öÈÕÖ¾ÎļþµÄ±¸·Ý¡£Ëü¶ÔORACLEÊý¾Ý¿âµÄ±¸·ÝºÍ»Ö¸´ÆðÖÁ¹ØÖØÒªµÄ×÷Óá£ÊÇÁª»úÖØ×öÈÕÖ¾ÎļþµÄÒ»¸ö¸±±¾£¬Óë±»¸´ÖƵijÉÔ±Íê³ÉÒ»Ñù£¬¼´ÖØ×ö¼Ç¼Ïàͬ£¬ÈÕÖ¾ÐòÁкÅÏàͬ¡£
Ò»¡¢Êý¾Ý¿âµÄ¹éµµÓë·Ç¹éµµÄ£Ê½£º
1£® µ±Êý¾Ý¿â´¦ÓÚNOACRCHIVELOGģʽʱ£¬²»¶ÔÖØ×öÈÕÖ¾Îļþ½øÐй鵵£¬Ö±½Ó¸²¸Ç¾ÉµÄÖØ×öÈÕÖ¾Îļþ£¬´ËʱÊý¾Ý¿âÖ»ÄÜ´ÓÀý³Ìʧ°ÜÖнøÐлָ´¡£
ÌØµã£º
a. ·¢ÉúÈÕÖ¾Çл»Ê±£¨alter system switch logfile£©£¬LGWRºǫ́½ø³Ì¿ÉÒÔÎÞÌõ¼þ¸²¸ÇÔÀ´µÄÒѾ±äΪ·Ç»î¶¯µÄ£¨INACTIVE£©ÖØ×öÈÕÖ¾ÎļþµÄÄÚÈÝ¡£
b. ½øÐÐÊý¾Ý¿â±¸·Ýʱ£¬±ØÐëÏÈʹÓÃSHUTDOWN »òÕßSHUTDOWN IMMEDIATEÃüÁîÏȹرÕÊý¾Ý¿â£¬È»ºó²ÅÄÜͨ¹ý²Ù×÷ϵͳ±¸·ÝËùÓеÄÎïÀíÎļþ¡£¼´À䱸·Ý¡£²»ÄܽøÐÐÁª»úµÄÈȱ¸·Ý¡£
c. NOACRCHIVELOGģʽʱ£¬Ö»Äܱ£»¤Êý¾Ý¿âÃâÓÚÀý³Ìʧ°Ü£¬µ«²»Äܱ£»¤Êý¾Ý¿âÃâÓÚ½éÖÊʧ°Ü¡£
d. NOACRCHIVELOGģʽ²»ÐèÒª¿¼ÂÇ´æ´¢¿Õ¼äµÄÎÊÌâ¡£
2£® µ±Êý¾Ý¿â´¦ÓÚACRCHIVELOGģʽʱºò£¬ÏµÍ³Í¨¹ýºǫ́½ø³ÌARCnÀ´°ïÖúDBA×Ô¶¯Íê³É¶ÔÖØ×öÈÕÖ¾Îļþ½øÐй鵵£¬¹éµµÖ®ºó²Å¸²¸Ç¾ÉµÄÖØ×öÈÕÖ¾Îļþ£¬²¢½«Æä¸´ÖƵ½Ò»¸öÖ¸¶¨µÄλÖ㬳ÉΪ¹éµµÈÕÖ¾Îļþ£¬´ËʱÊý¾Ý¿â»¹ÄܽøÒ»²½´Ó½éÖÊʧ°ÜÖлָ´¡£¼´¿É½«Êý¾ÝµÄËðʧ¼õÉÙµ½×îС£¬¿ÉÓÃÐÔÌá¸ßµ½×î¸ß¡£
ÌØµã£º
a. µ±ACRCHIVELOGģʽʱ¡£¿ÉÒÔ¶ÔÊý¾Ý¿â½øÐÐÁª»úµÄÈȱ¸·Ý¡£
b. µ±³öÏÖÊý¾ÝÎļþËð»µÊ±£¬³ýÁËSYSTEM±í¿Õ¼äµÄÊý¾ÝÎļþ£¬ÆäËû±í¿Õ¼ä¶¼¿ÉÒÔÔÚÊý¾Ý¿â´¦ÓÚOPENʱ»Ö¸´¡£
c. Ö´ÐÐÊý¾Ý¿â±¸·Ýʱ£¬²»½ö¿ÉÒÔ½øÐÐÍê³É»Ö¸´£¬Ò²¿ÉÒÔÖ¸¶¨»Ö¸´µ½Ä³¸öÌØ¶¨µÄʱ¼äµã¡£
Ò»¡¢Êý¾Ý¿â¹éµµ²ÎÊý
ͨ¹ýARCHIVE LOG LIST ²é¿´Êý¾Ý¿âµÄ¹éµµÄ£Ê½£»
1£® LOG_ARCHIVE_DUPLIEX_DESTÓëLOG_ARCHIVE_DEST_n
LOG_ARCHIVE_DESTÓÃÓÚÖ¸¶¨µÚÒ»¸ö¹éµµÄ¿±êλÖã¨Ö÷¹éµµÄ¿±ê£©£¬n±íʾ¸´±¾ÊýÁ¿¡£Èç¹ûÖ»ÉèÖÃÒ»¸ö¸´±¾£¬µ±Õâ¸ö¸´±¾´íÎóʱºò£¬Ôò¿ÉÒÔͨ¹ýÆäËû¸´±¾±¸Óᣣ¨1<=n<=10£©
LOG_ARCHIVE_DUPLIEX_DESTÓÃÓÚÖ¸¶¨µÚ¶þ¸ö¹éµµÄ¿±êλÖ㨴ι鵵Ŀ±ê£©£¬
ÕâÁ½¸ö²ÎÊýµÄÏàÅųâµÄ£¬²»ÄÜͬʱ´æÔÚ¡£
2£® Æô¶¯ºÍ½ûÓÃ×Ô¶¯¹éµµµÄ²ÎÊý
Ïà¹ØÎĵµ£º
½«±í¿Õ¼äºÍÊý¾ÝÎļþ´ÓÒ»¸öλÖÃÒÆ¶¯µ½ÁíÒ»¸öλÖõIJÙ×÷·½·¨
Ò»£® OFFLINE
OFFLINE ·ÖΪALTER DATABASE Óë ALTER TABLESPACE OFFLINE£¬
ËûÃǵÄÇø±ð²Î¿´blog£ºhttp://blog.csdn.net/tianlesoftware/archive/2009/11/29/4898800.aspx
°´Êý¾ÝÎļþÀ´£º
1.ÏȽ«ÏàÓ¦µÄÊý¾ÝÎļþ offl ......
RedoµÄÄÚÈÝ
Oracleͨ¹ýRedoÀ´ÊµÏÖ¿ìËÙÌá½»£¬Ò»·½ÃæÊÇÒòΪRedo Log File¿ÉÒÔÁ¬Ðø¡¢Ë³ÐòµØ¿ìËÙд³ö£¬ÁíÒ»¸ö·½ÃæÒ²ºÍRedo¼Ç¼µÄ¾«¼òÄÚÈÝÓйء£
Á½¸ö¸ÅÄ
¸Ä±äÏòÁ¿£¨Change Vector£©
¸Ä±äÏòÁ¿±íʾ¶ÔÊý¾Ý¿âÄÚijһ¸öÊý¾Ý¿éËù×öµÄÒ»´Î±ä¸ü¡£¸Ä±äÏòÁ¿Öаüº¬Á˱ä¸üµÄÊý¾Ý¿éµÄ°æ±¾ºÅ¡¢ÊÂÎñ²Ù×÷´úÂë¡¢±ä¸ü´ÓÊôÊý¾Ý¿éµÄµØÖ·£¨DBA£ ......
SQLÖеĵ¥¼Ç¼º¯Êý
1.ASCII
·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;
SQL> select ascii('A') A,ascii('a') a,ascii('0') zero,ascii(' ') space from dual;
A A ZERO ......
oracleµÄÌåϵ̫ÅÓ´óÁË£¬¶ÔÓÚ³õѧÕßÀ´Ëµ£¬ÄÑÃâ»áÓÐЩÎÞ´ÓÏÂÊֵĸоõ£¬Ê²Ã´¶¼Ïëѧ£¬½á¹ûʲô¶¼Ñ§²»ºÃ£¬ËùÒÔ°Ñѧϰ¾Ñé¹²Ïíһϣ¬Ï£ÍûÈøոÕÈëÃŵÄÈ˶ÔoracleÓÐÒ»¸ö×ÜÌåµÄÈÏʶ£¬ÉÙ×ßһЩÍä·¡£
Ò»¡¢¶¨Î»
oracle·ÖÁ½´ó¿é£¬Ò»¿éÊÇ¿ª·¢£¬Ò»¿éÊǹÜÀí¡£¿ª·¢Ö÷ÒªÊÇдд´æ´¢¹ý³Ì¡¢´¥·¢Æ÷ʲôµÄ£¬»¹ÓоÍÊÇÓÃOracle ......
OracleµÄ9¸ö_name
2008-07-17 23:47
1¡¢db_name Êý¾Ý¿âÃû
¡¡¡¡SQL> connect xys/manager as sysdba
¡¡¡¡ÒÑÁ¬½Ó¡£
¡¡¡¡SQL> show user
¡¡¡¡USER Ϊ "SYS"
¡¡¡¡SQL> show parameter db_name
¡¡¡¡NAME TYPE VALUE
¡¡¡¡---- -------- ------------
¡¡¡¡db_name string test1
¡¡¡¡db_nameÊÇÊý¾Ý¿âµÄÃû×Ö£¬or ......