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[……]
February 15, 2012 11g, oracle No comments 11g new feature
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[……]
February 10, 2012 Internals, oracle No comments scripts
set echo off
————————————————–
— @name: lock_internal
— @author: dion cho
— @description: my own version of[……]
February 9, 2012 migration, oracle, replication No comments dataguard
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
Applies to:
Oracle Server – Enterprise Edition – Version: 9.2[……]
February 3, 2012 11g, oracle No comments 11g new feature
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[……]
February 3, 2012 11g, oracle No comments 11g new feature
总结了11g partition new feature
11G Introduced partition extensions:
-Interval partitioning
-REF partitioning
-More Composite Partitioning
-Virtual[……]
January 18, 2012 maintain, MYSQL No comments mysql
由于此前的mysql salve服务器没有进行规划,一些参数都是使用的默认参数,导致innodb datafile 无限制增长,所以需要重新规划一下datafile空间的分配,以及其他参数的优化
version:
mysql>
mysql>
mysql> select version([……]
January 16, 2012 maintain, oracle No comments scripts
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[……]
January 13, 2012 Internals, oracle No comments structure
NOLOGGING is supported in only a subset of the locations that support LOGGING. Only the following operations support the NOLOGGING mode:
DML:
1. Dir[……]
January 11, 2012 oracle, replication, system No comments dataguard
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[……]