Blog | Pythian | Oracle (23)

Oracle

Oracle Silent Mode, Part 9: Remove a Node from an 11.1 RAC database

This 9 th post will describe how to remove a node from a 11.1 RAC cluster in silent mode. It will differ from the ...

Oracle

Oracle 11g -- Audit Enabled by Default, But What About Purging?

Introduction If you have created a new Oracle 11g database using DBCA and opted to use by default 11g's enhanced ...

Oracle

Quick Install Guide for Oracle 10g Release 2 on Mac OS X Leopard & Snow Leopard

I was very surprised that Oracle released Oracle Database for Mac OSX, especially, version 10g now that 11g has been ...

Oracle

Tuning 'log file sync' Event Waits

In this blog entry, I will discuss strategies and techniques to resolve 'log file sync' waits. This entry is intended ...

Oracle

Does Oracle's Block Change Tracking File Shrink?

Intro Just a quick post to get myself back into blogging mode. Recently in IRC ( #oracle on freenode, to be precise), a ...

Oracle

Oracle RAC and gv$ Views: A Second Look

Context I decided to reprise my commentary on Oracle RAC and the gv$ views after reading Patrick’s comments on my ...

Oracle

How to Dynamically Call PL/SQL Procedure in Oracle

Dynamic procedure calls in Oracle PL/SQL Just got an interesting note on Twitter that you can’t call a stored procedure ...

Oracle

How To Choose Your Oracle Database ID (DBID)

You can choose a DBID when you rename your Oracle database. This is probably a bad, unsupported, and useless idea. I ...

Oracle

Adding Columns with Default Values and Not Null in Oracle 11g

Oracle 11g has a new performance enhancement when adding columns. In the pre-11g releases, adding a new not null column ...

Oracle

Testing a Physical Standby Database in Oracle 10g

If you don’t want to deal with missteps, I recommend that you test your standby database to facilitate the failover or ...

Oracle

ORA-01450 During Online Index Rebuild

Background We hit an ORA-01450 error today trying to do online rebuild for an index in an unusable state. This was a ...

Oracle

JSP Cache Issues in 11i and R12

As an Apps DBA, you might have been asked to clear the JSP cache many times, either by Developers or Oracle Support. ...

Oracle

Oracle Silent Mode, Part 8: Add a Node to a 11.1 RAC Database

The process of adding a node to a 11.1 RAC is very similar to the 10.2 process described in Part 5 of this series. For ...

Oracle

How to Find Objects Creating nologging Changes

In an Oracle-l thread, this question was raised: how can you find objects creating nologging changes? First, what is a ...

Oracle

ORA-16069? You May Need A New Standby Controlfile

Backstory: On a recent Monday, I had to perform an emergency Oracle standby switchover for a client whose primary ...

Oracle

Performance Tuning: HugePages in Linux

Recently we quickly and efficiently resolved a major performance issue with one of our New York clients. In this blog, ...

Oracle

Standby Log Apply Elapsed Time

This has been discussed before by my colleague Paul Moen in his article on Oracle standby recovery rate monitoring, but ...

Oracle

How to Tie OS-level PIDs to Oracle Database Sessions

About once a week, our team gets a request from the server admins to provide some information on why a database server ...

Oracle

Oracle Performance Issue: High Kernel-Mode CPU Usage

Recently, I resolved a performance issue with one of our esteemed clients. I found the problem interesting and worth ...

Oracle

How to become an Oracle Certified Master (OCM)

A turning point in a DBA’s career is when he/she is recognized by Oracle as an elite Oracle professional. I was happily ...

Oracle

Killing an Oracle Job Dead

If you ever thought it was easy to kill an Oracle job, let me show you something that gave me a headache today. We’re ...

Oracle

Resolving High Water Enqueue Contention

Recently, I had a few email exchanges — on the Oracle-l list and offline — about HW enqueue contention. A few ...

Oracle

Oracle Silent Mode, Part 1: Installation Of 10.2 And 11.1 Databases

This post is the first of a series of ten posts that will explore some of the Oracle Universal Installer (OUI), Network ...

Oracle

Oracle: Delete and Re-Insert a Row in the Same Statement

It’s probably worth some explanation to understand where I want to drive you: when you run an update in Oracle, the ...

Oracle

Consistent Gets not the Best Way to Look at Query Performance

This post is for those who think Consistent Gets is the only thing that matters. It’s not. That’s why Statspack and AWR ...

Oracle

Setting up Virtual Hosts for Database and Applications Tiers in 11i

I would like to share with you the virtual hosts set-up (two nodes each on the application tier, and two on the DB ...

Oracle

Oracle 11g ASM Diskgroup Compatibility

Back in April I was at COLLABORATE 08 and delivered a presentation on 11g — Oracle 11g New Features Out of the Box, ...

Oracle

Tuning Latch Contention: Cache-buffers-chain latches

Recently, I had an opportunity to tune latch contention for cache buffers chain (CBC) latches. The problem was high ...

Oracle

Oracle E-Business Suite: Querying Patches, Part 2

In the first part of this blog I tried to shed some light on EBS patch terminology and naming conventions. In this ...

Oracle

FLASHBACK TABLE vs. DBA_OBJECTS . LAST_DDL_TIME

A little over a week ago, a teammate and I were trying to use Oracle’s FLASHBACK TABLE to undo an “oops” UPDATE ...

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Oracle Silent Mode, Part 9: Remove a Node from an 11.1 RAC database

Oracle 11g -- Audit Enabled by Default, But What About Purging?

Quick Install Guide for Oracle 10g Release 2 on Mac OS X Leopard & Snow Leopard

Tuning 'log file sync' Event Waits

Does Oracle's Block Change Tracking File Shrink?

Oracle RAC and gv$ Views: A Second Look

How to Dynamically Call PL/SQL Procedure in Oracle

How To Choose Your Oracle Database ID (DBID)

Adding Columns with Default Values and Not Null in Oracle 11g

Testing a Physical Standby Database in Oracle 10g

ORA-01450 During Online Index Rebuild

JSP Cache Issues in 11i and R12

Oracle Silent Mode, Part 8: Add a Node to a 11.1 RAC Database

How to Find Objects Creating nologging Changes

ORA-16069? You May Need A New Standby Controlfile

Performance Tuning: HugePages in Linux

Standby Log Apply Elapsed Time

How to Tie OS-level PIDs to Oracle Database Sessions

Oracle Performance Issue: High Kernel-Mode CPU Usage

How to become an Oracle Certified Master (OCM)

Killing an Oracle Job Dead

Resolving High Water Enqueue Contention

Oracle Silent Mode, Part 1: Installation Of 10.2 And 11.1 Databases

Oracle: Delete and Re-Insert a Row in the Same Statement

Consistent Gets not the Best Way to Look at Query Performance

Setting up Virtual Hosts for Database and Applications Tiers in 11i

Oracle 11g ASM Diskgroup Compatibility

Tuning Latch Contention: Cache-buffers-chain latches

Oracle E-Business Suite: Querying Patches, Part 2

FLASHBACK TABLE vs. DBA_OBJECTS . LAST_DDL_TIME

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