oracle

Exadata vs Teradata

April 1, 2012 Exadata, oracle No comments

Teradata 与 Exadata 的一些对比说明,由于是TD出来的文档 所以有一些片面之词

[……]

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Recover physical standby database after loss of archive log

March 20, 2012 oracle, replication 2 comments

今天报表数据库的备库出现了问题,由于监控脚本出现了问题,主机空间耗尽 而没有及时发出邮件,导致归档无法进行,DB停滞在一个时间点,同时在主库 由于只保留了2天的归档 导致这部分归档没有传输至备库,等我们发现问题时,主库已经删除了归档,备库接近8天gap无法恢复。由于主库超过3个T ,重新用备份恢复一[……]

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logic standby ORA-01403 故障处理一例 (2)

March 18, 2012 oracle, replication 3 comments

前几天刚处理了 logic standby故障,还没缓过神来 , logical standby 又出问题了。 还是那张表,那个错误 不得不让我怀疑 是不是那张表出现了问题。记录一下解决的过程:

2012-03-16 11:45:00 update “PROD_DATA2″[……]

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logic standby ORA-01403 故障处理一例

March 14, 2012 oracle, replication 2 comments

昨天的logic standby 事故处理:

夜里12点左右 2台logic standby 全部停止日志apply 查看logic standby 相关进程发现:

1.select spid, type, status from v$logstdby_process no rows[……]

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Create a database link with the new host:port/service syntax

March 8, 2012 11g, maintain, oracle 1 comment

Create a database link with the new host:port/service syntax

Submitted by tanelpoder on Mon, 2012-03-05 15:57

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I just noticed that (finall[……]

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创建index之前如何确定其大小

March 8, 2012 Internals, maintain, oracle 1 comment

昨天看了roger的一篇文章,如何在创建index 之前估算它的大小,这里有一种更简单的方法实现:

主要思路就是采用了dbms_space.create_index_cost这个包

–create a testing table named t
SQL> create tabl[……]

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11gR2 RAC Rebootless Node Fencing

March 6, 2012 Internals, oracle, RAC No comments

Rebootless Node Fencing

In versions before 11.2.0.2 Oracle Clusterware tried to prevent a split-brain with a fast reboot (better: reset) of the[……]

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Scripts:sess_uncommited_transactions.sql

March 2, 2012 maintain, oracle No comments

This script is monitoring sessions that are not commited :

— |—————————————————————————-|[……]

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Cloning an Oracle Home

March 2, 2012 migration, oracle 1 comment

Cloning an Oracle Home

Cloning an Oracle home involves creating a copy of the Oracle home and then configuring it for a new environment. If[……]

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11.2.0.3 datapump got ORA-38500

February 23, 2012 maintain, oracle No comments

从10.2.0.5的库导入一张表的增量数据到11.2.0.3 impdp报出如下错误,对比两边表结构一致,tablespace有剩余空间 报错如下:

[oracle@localhost ~]$ impdp \’\/ as sysdba \’ directory=pump dum[……]

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