Blog | Pythian | Oracle (25)

Oracle

What Happens When You Leave an Oracle Database in Backup Mode

While I was at that fine conference in Scotland, one of our clients did some maintenance on their Windows server where ...

Oracle

Oracle Data Pump Can't Import LONG Columns

If you are using Oracle Data Pump to backup tables containing LONG or LONG RAW columns, then you might be surprised ...

Oracle

ORA-01206: File is not part of this database - wrong database id

This was posted yesterday on Oracle-L by Li Li. I feel I should blog about it to spread the word, especially since not ...

Oracle

Oracle 10g R2 RAC - vip on wrong interface

Problem Statement I was installing RAC, and during the clusterware install I picked up the wrong interfaces for public ...

Oracle

Basic I/O Monitoring on Linux

This is my fourth week at Pythian and in Canada and I'm starting to get back to my normal life cycle --- my personal ...

Oracle

Implementing Many-to-many Relationships in Data Warehousing

Context This article will discuss how to make many-to-many relationships in data warehousing easily queried by novice ...

Oracle

Sequences in Oracle 10g RAC

Just recently I got a call from a developer. He had a table with a primary key populated by a sequence, a timestamp ...

Oracle

Oracle Data Pump Schema Export and Public Synonyms

Background While testing a migration today with one of our clients, I figured out that schema export using Data Pump ...

Oracle

Slow rman Backups? Check This Out

Notice If you have found rman backups slow in Oracle 10.2.0.2, you should check out note 375386.1 on metalink. It seems ...

Oracle

Oracle RAC Cache Fusion Efficiency: A Buffer Cache Analysis

My apologies — there will be no broccoli in this post. Introduction Many people would like to know how well their ...

Oracle

ASM multi-disk performance

This is a fascinating look into storage architecture! It perfectly illustrates that "more hardware" doesn't always ...

Oracle

ORA-07202: sltln: invalid parameter to sltln

Context I hit this issue today while creating a new 10.2.0.3 database using DBCA. Recently, I’ve started to use DBCA ...

Oracle

Oracle block corruptions, DBV vs RMAN

Over-the-Top Tales from the Trenches Motto: Bringing order to the chaos of every day DBA life. Dear Diary, Is that a ...

Oracle

Silly DBA Tricks 1: Editing the SPFILE

Here is an article I posted on the Oracle-L mailing list recently. Much to my surprise, people liked it enough that ...

Oracle

Oracle: How to move a table to another schema?

Backstory A client asked me, “How can I move a table to another schema in Oracle?” The quick answer I gave him is, “not ...

Oracle

Aligning ASM Disks on Linux

Linux is a wonderful operating system. However there are a number of things that one needs to do to make sure it runs ...

Oracle

No data found -> success in dbms_scheduler

Situation One of our clients found a bug with dbms_scheduler: it logs a job as successful when a ORA-01403 is thrown. ...

Oracle

Oracle: Standby Automatic File Management

So you have followed the recipes to create a standby database, setup the database to switch logs automatically, and ...

Oracle

RMAN Skip Tablespace Issue

Important We came across something in RMAN while working on a duplicate database. The ‘skip tablespace’ command when ...

Oracle

RMAN reports, or What Is the ETA of My Backup?

Introduction Over-the-Top Tales from the Trenches. Motto: Bringing order to the chaos of every day DBA life. Dear ...

Oracle

The Mysterious World of Shmmax and Shmall

Over the Top Tales from the trenches. Motto: Bringing order to the chaos of every day DBA life. Dear Diary, Today I ...

Oracle

RMAN Recipes: How to Switch Oracle Logs Automatically

So you have swallowed the standby bait. You have used RMAN duplicate to create a sparkling new standby and things are ...

Oracle

Speeding-Up Oracle Export/Import Migration

Or, How To Become an Export/Import Migration Superstar! We’ve already established that I like broccoli. I get the taste ...

Oracle

Block Change Tracking Internals: X$ Tables Research

Introduction With this post, I’m starting a series about Oracle Block Change Tracking internals. The feature was ...

Oracle

Failovers with Oracle Dataguard

In the last month, we have been hit with two clients’ large-scale failures. The first involved network issues; the ...

Oracle

Changing Hostnames in Oracle RAC

Update: this procedure is for Linux and should work on any UNIX OS. Ron supplied how he did this on Windows in the ...

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What Happens When You Leave an Oracle Database in Backup Mode

Oracle Data Pump Can't Import LONG Columns

ORA-01206: File is not part of this database - wrong database id

Oracle 10g R2 RAC - vip on wrong interface

Basic I/O Monitoring on Linux

Implementing Many-to-many Relationships in Data Warehousing

Sequences in Oracle 10g RAC

Oracle Data Pump Schema Export and Public Synonyms

Slow rman Backups? Check This Out

Oracle RAC Cache Fusion Efficiency: A Buffer Cache Analysis

ASM multi-disk performance

ORA-07202: sltln: invalid parameter to sltln

Oracle block corruptions, DBV vs RMAN

Silly DBA Tricks 1: Editing the SPFILE

Oracle: How to move a table to another schema?

Aligning ASM Disks on Linux

No data found -> success in dbms_scheduler

Oracle: Standby Automatic File Management

RMAN Skip Tablespace Issue

RMAN reports, or What Is the ETA of My Backup?

The Mysterious World of Shmmax and Shmall

RMAN Recipes: How to Switch Oracle Logs Automatically

Speeding-Up Oracle Export/Import Migration

Block Change Tracking Internals: X$ Tables Research

Failovers with Oracle Dataguard

Changing Hostnames in Oracle RAC

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