oracle sequenceÖµÖØÖûØ1
declare
n number(10);
tsql varchar2(100);
begin
select test_seq.nextval into n from dual;
n:=-(n-1);
tsql:='alter sequence test_seq increment by'|| n;
execute immediate tsql;
select test_seq.nextval into n from dual;
tsql:='alter sequence test_seq increment by 1';
execute immediate tsql;
end;
Ïà¹ØÎĵµ£º
SVRMGR> select * from dba_jobs;
³õʼ»¯Ïà¹Ø²ÎÊýjob_queue_processes
alter system set job_queue_processes=39 scope=spfile;//×î´óÖµ²»Äܳ¬¹ý1000 ;job_queue_interval = 10 //µ÷¶È×÷ҵˢÐÂÆµÂÊÃëΪµ¥Î»
DBA_JOBS describes all jobs in the database.
USER_JOBS describes all jobs owned by the c ......
½ñÌìÔÚÒ»±¾ÊéÉÏ¿´µ½µÄ£¬¸Ð¾õͦȫµÄ¡£Ó¡ÏóÖÐ×Ô¼ºÒѾ²»ÖªµÀ°Ù¶ÈÁ˶àÉÙ´ÎÕâ¸öÎÊÌ⣬½ñÌì¾Í¼ÇÏÂÀ´°É£¬·½±ãÒÔºó²éѯ¡£
Êý¾Ý¿âд½ø³ÌÔÚÒÔÏÂʼþÖ®Ò»·¢Éúʱ°ÑÊý¾Ý¿â¸ßËÙ»º³åÇøµÄÊý¾Ýдµ½Êý¾ÝÎļþÉÏ:
µ±Ô໺³åÇøµÄÊýÁ¿³¬¹ýÁËËùÉ趨µÄÏÞ¶î
µ±ËùÉ趨µÄʱ¼ä¼ä¸ôÒѵ½
µ±Óнø³ÌÐèÒªÊý¾Ý¿â¸ßËÙ»º³åÇøÈ´ÕÒ²»µ½¿ÕÏеĻº³åÇøÊ±
µ±¼ì²éµ ......
Oracle 9i±È8i¶àÁËÄÄЩÐÂÌØÐÔ£¿
¼òҪ˵£º
9i¸üÒ×ÓÚ¹ÜÀí¡£
Ïêϸ˵£º
²¢·¢¼¯Èº£¬8i OPSÉý¼¶Îª9i RAC£¬8i½áµã¼äÓÃÓ²Å̽»»»ÐÅÏ¢£¬9i½áµã¼ä²ÉÓøßËÙÍøÏߵĻº´æÈÛºÏ(Cache Fusion)¼¼Êõ½»»»ÐÅÏ¢£¬½»»»ËÙ¶ÈÌá¸ß100±¶ÒÔÉÏ¡£
9i¿ÉÒÔÔÚÏßÐÞ¸ÄÄں˲ÎÊýºÍÄÚ´ ......
±¾ÎÄ×ªÔØ:http://blog.csdn.net/flm_0722/archive/2009/10/08/4643566.aspx
Ò»¡¢ÉèÖóõʼ»¯²ÎÊý job_queue_processes
¡¡¡¡sql> alter system set job_queue_processes=n;£¨n>0£©
¡¡¡¡job_queue_processes×î´óֵΪ1000
¡¡¡¡
¡¡¡¡²é¿´job queue ºǫ́½ø³Ì
¡¡¡¡sql>select name,description from v$bgprocess;
......
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 offline
ALTER DATABASE DATAFILE 'D:\OR ......