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2008-12-02 13:08:36 / Oracle数据库管理
新建一assm的表空间test后SQL> select extent_id,file_id,block_id,blocks,bytes from dba_extents where segment_name='T';EXTENT_IDFILE_IDBLOCK_IDBLOCKSBYTES---------- ---------- ---------- ---------- ----------01607538655361160761865536216076986553631607778655364160785
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2008-12-01 15:18:47 / Oracle数据库管理
除了 spoolselect 'drop table',table_name from all_tables where tablespace='MYTS' and owner='SYSTEM';
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2008-11-28 16:59:40 / Oracle数据库管理
我的assm表空间上的表t 得不到 不同pct值。0% -- 25% free space blocks.............00% -- 25% free space bytes..............025% -- 50% free space blocks............025% -- 50% free space bytes.............050% -- 75% free space blocks............050% -- 75% free space bytes.............075% -- 100% free space blocks...........075% -- 100% free space bytes............0只能得到类似这种SQL> exec show_space('question','AUTO');Total Blocks............................8Total
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2008-11-28 14:37:21 / Oracle数据库管理
最近在看performance tuning,建议log switch保持在1小时3-4次SQL> select * from v$log_history;truncating (as requested) before column NEXT_CHANGE#truncating (as requested) before column RESETLOGS_CHANGE#RECIDSTAMPTHREAD#SEQUENCE# FIRST_CHANGE# FIRST_TIMERE---------- ---------- ---------- ---------- ------------- ------------------- --167190268111446075 2008-11-27 15:37:31 2026719022261
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2008-11-28 08:49:50 / Oracle数据库管理
我在vm虚拟机里面装了centos系统。。。不知道为什么本机连不进去。。ping也不通。。谁能告诉我怎么回事啊 ??我选择的是host!!
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2008-11-25 16:21:26 / Oracle数据库管理
oracle concept中提到:Row Chaining and MigratingIn two circumstances, the data for a row in a table may be too large to fit into asingle data block. In the first case, the row is too large to fit into one data blockwhen it is first inserted. In this case, Oracle stores the data for the row in a chain ofdata blocks (one or more) reserved for that segment. Row chaining most oftenoccurs with large rows, such as rows that contain a column of datatype LONG orLONG RAW. Row chaining
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2008-11-25 09:18:19 / Oracle数据库管理
好象可以不用asmlib,直接用祼设备建asm diskgroup但,现在用Dbca工具创建asm时,建diskgroup时查找不到member disk
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2008-11-18 09:14:31 / Oracle入门与认证
:)
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2008-11-12 14:13:10 / Oracle入门与认证
043过了之后,多久之内去参加原厂培训还能拿到证书?
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2008-11-12 09:47:39 / Oracle入门与认证
OCA:1Z0-042 TK168.exe和1Z0-042 168道题.pdf背哪一个啊?还有一个:想过OCP一定要先过OCA才行吗?还有其他途径吗?
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