Michael Dinh

Oracle

Recovering from quarterly PSU patching disaster

Applying Patching Applying GRID INFRASTRUCTURE PATCH SET UPDATE 11.2.0.4.181016(Patch 28429134) for AIX (64-Bit) was a ...

Oracle

Sharing GoldenGate directories in RAC environments

GoldenGate operates in an active/passive capacity for RAC databases. When installing GoldenGate on a local host, ...

Oracle

Using rsync to Copy GoldenGate Trails from DBFS to ACFS

It sounds like you're putting ACFS through its paces before making the big jump. Testing for IO sustainability is a ...

Oracle

Oracle Enterprise Manager Cloud Control 13c release 3 (13.3.0.0) database template

Intro I am currently working on a project to install Oracle Enterprise Manager Cloud Control Release 13.3 and was ...

Oracle

Troubleshooting RAC GoldenGate relocation

During Oracle RAC online patching, the GoldenGate resource must be relocated to a surviving node to maintain ...

Oracle

Troubleshooting failed database startup after GRID Out Of Place (OOP) rollback

Successful GRID Out-of-Place (OOP) Patching to 18.6 GRID Out Of Place (OOP) patching completed successfully for ...

Oracle

A script for Relocating and Restoring Database Services

Due to complex requirements for service relocate and restore as part of patching, I decided to script the process.

Oracle

Using RDA to check Oracle Database preinstallation

Remote Diagnostic Agent (RDA) is often under-utilized. It has some very nice features such as database preinstallation ...

Oracle

Troubleshooting a datapatch error in Oracle

Troubleshooting datapatch failure As part of patching preparation, the following command was executed and failed: ...

Oracle

How do you test your Oracle database backup?

From my experience, the one area where a DBA cannot afford to make errors is in database backup. When was the last time ...

Oracle

How To Resize Oracle ACFS Volume

There may be many reasons as to why Oracle ACFS volume would need to be resized. Current Filesystem for ACFS is 299G.

Oracle

Troubleshooting a GoldenGate error code

Introduction After applying Oracle GoldenGate V12.2.0.1.170919 for Oracle Database 12c OPTIMIZER Patch for Bug# ...

Oracle

Troubleshooting a failure when upgrading to Oracle 18c

Upgrading Oracle Grid Infrastructure is often a smooth ride until that final configuration step hits a wall. When ...

Microsoft SQL Server

How to prepare a response file for a grid 18c silent upgrade

Due to security and complexity of the environment, the option to use Graphical User Interface (GUI) is not always ...

Oracle

GoldenGate: relative or absolute path for trail files?

When implementing GoldeGate solutions, something as simple as path to trail files can create havoc. What is the correct ...

Microsoft SQL Server

A simple command that saved me

Context So there I was, reviewing the environment to create an action plan for patching. To my surprise, I noticed the ...

Oracle

How to delete an RAC Database Using DBCA silent mode

During a recent Proof of Concept (POC) involving the migration of a RAC non-CDB to a CDB, I ran into a few snags that ...

Oracle

How to troubleshoot a failure to mount DBFS

When attempting to shut down Oracle Clusterware, you might encounter the frustrating CRS-2675: Stop of 'ora.crsd' on ...

Oracle

EM 12c, EM 13c: delete agent and targets using emcli

Situation It's feasible to delete agents and targets using GUI but can take a lot of work depending on configuration ...

Oracle

How to configure X11 for Vagrant Box

"Good artists copy, great artists steal" - Pablo Picasso

MySQL

Gathering GoldenGate deployment status

The objective of this post is to demonstrate how to gather existing GoldenGate deployment status. The rationale is to ...

Oracle

The best times to apply Oracle quarterly patches

When is the best time to apply an Oracle quarterly patch? I suppose the answer is, "It depends." As it turns out, we ...

Oracle

How to efficiently back up and restore crontab

When a database environment is being patched, entries from crontab are commented and then removed when patching is ...

Oracle

How to determine RMAN backup size

Importance A time long ago, I wrote a SQL query to determine RMAN backup size. Here is another validation for the SQL ...

Oracle

How To Delete MGMTDB and MGMTLSNR Using emcli

It sounds like you’ve run into one of those classic Oracle "features" where the system is a little too helpful for its ...

Oracle

How to mine an RMAN Log

I recently performed a Proof of Concept (POC) to compare and contrast Oracle Recovery Manager (RMAN) backup performance ...

Oracle

How to use mount-dbfs.sh to resolve "Device or resource busy"

It’s always a bit of a gamble when you start playing "Process Assassin" with fuser -mv. One minute you’re trying to ...

Oracle

Enable X11 forwarding after Sudo SSH session for AWS EC2 Linux instance

Challenges Working with a secure environment presents some challenges and this post will demonstrate how to overcome ...

Oracle

How to Find Cluster Resources Where Target!=State

Identifying resource state mismatches DBA typically checks cluster resources as part of patching efforts. However, when ...

Oracle

Exploring options of using RMAN configure to simplify backup

I am a simple person who likes simple things, especially RMAN backup implementation. I have yet to understand why many ...

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Michael Dinh

Posts by Michael Dinh

Recovering from quarterly PSU patching disaster

Sharing GoldenGate directories in RAC environments

Using rsync to Copy GoldenGate Trails from DBFS to ACFS

Oracle Enterprise Manager Cloud Control 13c release 3 (13.3.0.0) database template

Troubleshooting RAC GoldenGate relocation

Troubleshooting failed database startup after GRID Out Of Place (OOP) rollback

A script for Relocating and Restoring Database Services

Using RDA to check Oracle Database preinstallation

Troubleshooting a datapatch error in Oracle

How do you test your Oracle database backup?

How To Resize Oracle ACFS Volume

Troubleshooting a GoldenGate error code

Troubleshooting a failure when upgrading to Oracle 18c

How to prepare a response file for a grid 18c silent upgrade

GoldenGate: relative or absolute path for trail files?

A simple command that saved me

How to delete an RAC Database Using DBCA silent mode

How to troubleshoot a failure to mount DBFS

EM 12c, EM 13c: delete agent and targets using emcli

How to configure X11 for Vagrant Box

Gathering GoldenGate deployment status

The best times to apply Oracle quarterly patches

How to efficiently back up and restore crontab

How to determine RMAN backup size

How To Delete MGMTDB and MGMTLSNR Using emcli

How to mine an RMAN Log

How to use mount-dbfs.sh to resolve "Device or resource busy"

Enable X11 forwarding after Sudo SSH session for AWS EC2 Linux instance

How to Find Cluster Resources Where Target!=State

Exploring options of using RMAN configure to simplify backup

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