原创 So When Does An Oracle B-Tree Index Increase In Height ? (Almost Grown)
So when does an Oracle B-Tree index actually increase in height ? I’ve basically been asked this same question a number
2020-07-01 19:51:46
原创 FAL behavior on 11.2 (文檔 ID 1394472.1)
In this Document Goal Fix This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) pr
2020-07-01 19:51:46
原创 查看standby database的redo transport status
在主庫上查看view v$archive_dest_status SYNCHRONIZATION_STATUS及SYNCHRONIZED兩個欄位可以查看具體狀態
2020-07-01 19:51:46
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原创 Why Change the Oracle DB_FILE_MULTIBLOCK_READ_COUNT?
A higher DB_FILE_MULTIBLOCK_READ_COUNT (MBRC) number can influence the Oracle optimizer to lean toward full scans.The r
2020-07-01 19:51:46
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原创 How to Switch the Driving Table in a Hash Join (文檔 ID 171940.1)
************************************************************* This article is being delivered in Draft form and may c
2020-02-24 00:54:05
原创 Fixed Objects Statistics and why they are important
Fixed Objects Statistics and why they are important By Maria Colgan-Oracle on Jan 09, 2012 Fixed objects are the
2020-02-24 00:54:05
原创 Explain Plan with Parallel Processing
First table creation Let's recreate our Gigabyte sized table and do a full table scan in parallel. CREATE TABLE T2 (
2020-02-24 00:54:05
原创 hash join hint
Hash Joins Filed under: CBO,Execution plans,Hints,Oracle,Tuning — Jonathan Lewis @ 12:53 pm GMT Sep 7,2013 I’ve wr
2020-02-24 00:54:05
原创 sorts(disk)及sorts(memory)的意義
The sorts (disk) Oracle metric indicates if the number of disk writes is non-zero for a given sort operation, if so, th
2020-02-24 00:54:05
原创 OR expansion
r expansion is the use of OR's to process something instead of another met
2020-02-24 00:54:05
原创 oracle 11g dataguard 升級爲maximize protection
環境：11.2.0.4 on oracle linux 5.8 升級主庫爲maximize protection時需要注意以下兩點： 1 主庫的遠程archive log destination至少有一個需要滿足設定爲AFFIRM
2020-02-24 00:54:05
原创 Install Grid Infrastructure and Oracle Database SW for Standalone
1 Prerequisites (1) 內存檢查 如果需要同時安裝Grid Infrastrue及Database則內需要至少4G [oracle@sdb1 ~]$ free -m total u
2020-02-24 00:54:05
原创 Optimizer Transformations: OR Expansion
Optimizer Transformations: OR Expansion By Maria Colgan-Oracle on Apr 11, 2011 We continue our series on Optimizer
2020-02-24 00:54:05
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原创 linux特殊符號大全
linux特殊符號大全 在shell中常用的特殊符號羅列如下： # ; ;; . , / \ 'string'| ! $ ${} $?
2020-02-24 00:54:05
原创 oracle password file 命名規則
關於oracle密碼檔的一點學習[2008/9/3] 【字體：大 中 小】【列印】 創建密碼檔的命令 orapwd file=<> password=<> entries=最大數目 這裏的file
2020-02-24 00:54:05
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