系统alert在主库出现下面错误 OS为linux 5.5
Stopping background process CJQ0
Sat Feb 11 03:41:07 2012
Hex dump of (file 9, block 561424) in trace file /data/[……]
Category: oracle
11g new feature Index Invisible
11g为我们提供了Index Invisible特性，使用这个特性可以轻松的将index置为不可用状态，对比之前的将索引置为unusable
最大的改进是，当index设置为unusable时，索引将不再随着表数据的更新而更新，导致如果重新使用index 需要rebuild等操作
这对大型的OL[……]
Scripts:lock_internal
set echo off
————————————————–
— @name: lock_internal
— @author: dion cho
— @description: my own version of[……]
记录一次database upgrade 导致physical standby故障
记录一次database upgrade 导致physical standby故障
upgrade from 10.2.0.5->11.2.0.3
单节点的database升级很容易，严格按照手册，修改compatible=10.2.0
Recommendation for the Real Application Cluster Interconnect and Jumbo Frames
Recommendation for the Real Application Cluster Interconnect and Jumbo Frames
Applies to:
Oracle Server – Enterprise Edition – Version: 9.2[……]
11g nested loop faster than 10g
在pythian看到了一个测试，是否证明了oracle 11g is x% faster than 10g?(oracle官方的说法）
First, you have to create and fill a table to run your query :
create table[……]
11g partition new features
总结了11g partition new feature
11G Introduced partition extensions:
-Interval partitioning
-REF partitioning
-More Composite Partitioning
-Virtual[……]
Scripts:show_space
修改过的show_space 支持ASSM
create or replace
procedure show_space
( p_segname_1 in varchar2,
p_space in varchar2 def[……]
How does “Nologging” attribute
NOLOGGING is supported in only a subset of the locations that support LOGGING. Only the following operations support the NOLOGGING mode:
DML:
1. Dir[……]
Logic standby delay when query with for update clause
今天遇到一个奇怪的问题，3个logic standby 中有一个delay 查看任何日志都没有发现错误，有一个transaction在apply一个SQL，这条SQL没有任何问题，SQL所涉及到的表也没有任何问题
当时的apply情况如下：
SID USERNAME MACHINE[……]