03 2018 档案

UNDO（二）
摘要：Managing Undo Beginning with Release 11g, for a default installation, Oracle Database automatically manages undo. There is typically no need for DBA i 阅读全文
posted @ 2018-03-13 23:46 Ryan_Wo 阅读(280) 评论(0) 推荐(0)
UNDO -- Concept
摘要：Undo data Records of the actions of transactions, primarily before they are committed. The database can use undo data to logically reverse the effect 阅读全文
posted @ 2018-03-11 10:45 Ryan_Wo 阅读(224) 评论(0) 推荐(0)
Checkpoint
摘要：Overview of Checkpoints A checkpoint is a crucial mechanism in consistent database shutdowns, instance recovery, and Oracle Database operation general 阅读全文
posted @ 2018-03-04 17:53 Ryan_Wo 阅读(589) 评论(0) 推荐(0)
Data Block Compression
摘要：The database can use table compression to eliminate duplicate values in a data block. This section describes the format of data blocks that use compre 阅读全文
posted @ 2018-03-03 17:04 Ryan_Wo 阅读(411) 评论(0) 推荐(0)
Data Block -- Uncompressed
摘要：Overview of Data Blocks Oracle Database manages the logical storage space in the data files of a database in units called data blocks, also called Ora 阅读全文
posted @ 2018-03-03 12:41 Ryan_Wo 阅读(356) 评论(0) 推荐(0)