oracleɾ³ýËø±í
ÒÔdbaµÇ½
1.²é¿´Äĸö±í±»Ëø:
select b.owner,b.object_name,l.session_id,l.locked_mode
from v$locked_object l, dba_objects b
where b.object_id=l.object_id;
2.²é¿´±»Ëø±íµÄsid ºÍserial# :
select t2.username,t2.sid,t2.serial#,t2.logon_time
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time;
3.Ö´ÐÐÏÂÃæµÄÓï¾ä:
alter system kill session 'sid,serial#';
Ïà¹ØÎĵµ£º
The DB File Sequential Read wait event generally indicates a single block read (an index read,
for example). A large number could indicate poor joining orders of tables or unselective indexing.
This number will certainly be large (normally) for a high-transaction, well-tuned system. You ......
Êý¾Ý±íµÄÁ¬½ÓÓÐ:
1¡¢ÄÚÁ¬½Ó(×ÔÈ»Á¬½Ó): Ö»ÓÐÁ½¸ö±íÏàÆ¥ÅäµÄÐвÅÄÜÔÚ½á¹û¼¯ÖгöÏÖ
2¡¢ÍâÁ¬½Ó: °üÀ¨
£¨1£©×óÍâÁ¬½Ó(×ó±ßµÄ±í²»¼ÓÏÞÖÆ)
£¨2£©ÓÒÍâÁ¬½Ó(ÓÒ±ßµÄ±í²»¼ÓÏÞÖÆ)
£¨3£©È«ÍâÁ¬½Ó(×óÓÒÁ½±í¶¼²»¼ÓÏÞÖÆ)
3¡¢×ÔÁ¬½Ó(Á¬½Ó·¢ÉúÔÚÒ»Õ ......
ÒòΪºÜÉÙÓõ½, ËùÒÔ¼¸ºõÍü¼ÇÁËÕ⼸¸öº¯Êý, ²»¹ýËüÃÇ»¹ÊǺÜÓÐÓõÄʹÓÃËüÃÇ¿ÉÒÔ´ó´ó¼ò»¯Ò»Ð©SQLÎĵÄÓï·¨, ÖÁÓÚЧÂÊÎÊÌâ, ÈçCCWËù˵ËüÃǺÍEXISTS, IN Ö®ÀàûÓÐʲô²î±ð, ¶øÇÒÒª¾ßÌåÎÊÌâ¾ßÌå·ÖÎö
ÆäÖÐANYºÍSOMEÔÚÒâ˼ÉÏÊÇÏàͬµÄ, ¿ÉÒÔÏà»¥Ìæ´ú.
¾Ù¼¸¸öÀý×ÓÀ´ËµÃ÷ALLºÍANYµÄÓ÷¨
1. SELECT * from TABLEA WHERE FLD > AL ......
¡¡Ëæ×ÅÏÖ´úÊý¾Ý¿â¿ÉÓÃÌØÕ÷¼¯µÄѸËÙÔö¼Ó£¬ºÜÄÑÇø·ÖÊëºÃÊ뻵¡£ÀýÈçOracleÀï¾ÍÓÐÐí¶àÄã¿ÉÄÜ´ÓÀ´¶¼²»ÐèÒªµÄ¸ß¼¶Êý¾Ý²Ö¿âÌØÕ÷¡£´ËÍâÒ²¿ÉÄÜÓÐһЩÆäËü²»¿É»òȱµÄÌØÕ÷±ÈÈçACIDÊÂÎñÌØÐÔ¡£ÎÒÃÇÀ´¿´Ò»¿´Ö÷ÒªµÄÒ»Ð©ÌØÕ÷£¬±ÈÈç´æ´¢¹ý³Ì£¬ÊÓͼ£¬¿ìÕÕ£¬±íÊý¾ÝÀàÐͺÍÊÂÎñµÈµÈ¡£Í¬Ê±ÎÒÃÇ·ÖÎöÒ»ÏÂPostgresql£¬MySQLºÍOracleÕ⼸¸öÊý¾Ý¿â£¬È»º ......
--´´½¨±í¿Õ¼ä
create tablespace Ãû³Æ
(
datafile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨ÁÙʱ±í¿Õ¼ä
create temporary tablespace Ãû³Æ
(
tempfile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨Óû§
create user Óû§Ãû idtenified by ÃÜÂë
/
--ΪÓû§Ö¸¶¨ ......