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- Extent Allocation and Deallocation
SQL> alter table xxx allocation extent (size 1m datafile 'xxx');
SQL> alter table xxx deallocation unused; - Database Block
(1) set at tablespace creation
SQL> create tablespace kong2 datafile 'xxx' blocksize 8k; (必须指定db_8k_cache_size)
(2)DB_BLOCK_SIZE is the default block size -
initrans maxtrans
pctfree: 导致row migration(系统开销)
pctused:通知可以再使用
- Configuring Automatic Segment-Space Management
SQL> create tablespace xxx ... SEGMENT SPACE MANAGEMENT AUTO; - Manual Segment Space Management (pctfree,pctused,freelist)
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Oracle忘记数据库密码
2011-07-01 23:45 768alter user xxx identified by xx ... -
Oracle内存全面分析
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(15)Managing User
2010-07-07 13:59 843SQL> alter user xxx quo ... -
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2010-07-07 13:59 755Password Management SQL> ... -
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2010-07-07 13:58 748... -
(12) Managing Indexes
2010-07-07 13:58 739a -
(11)Managing Table
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(10) Managing Undo Data
2010-07-07 13:56 799show parameter undo; ... -
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2010-07-07 11:24 799Interactive Installation$ ./r ... -
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