Blog | Pythian | Database (12)

Database

How to Set Up REPMGR with WITNESS for PostgreSQL 10

This blog post will go over how to set up and implement repmgr which is the PostgreSQL application to manage ...

Oracle

Oracle E-Business Suite and 12cR1 database in Extended support - What to do?

Introduction If you are one of the folks who have already upgraded the production E-Business Suite database to 19c ...

Oracle

Troubleshooting Oracle Cloud Infrastructure Automatic Backups

Background I could start this blog the same way I started this one because everything is supposed to be easy and at a 1 ...

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

Why It's Good Practice to Run Datapatch -prereq after Creating Database

Starting with Oracle 12c, running datapatch may be required after creating a database, depending on the version and the ...

Oracle

Using MDBUtil To Create Grid Infrastructure Management Repository Database

Whether Grid Infrastructure Management Repository (GIMR) database MGMTDB is required or not depends on the version of ...

MySQL

How to fix error when MySQL client fails to load SQL file with Blob data

In one of my latest database restore jobs, I was helping a MySQL client with issues related to mysqlbinlog and I wanted ...

Database

Working with Ansible, PostgreSQL and Docker

While working on creating some of our internal training labs for PostgreSQL, I have had the pleasure of working with ...

MySQL

ProxySQL configuration file & startup process explained

When learning ProxySQL, we have seen some confusion around the configuration and especially around the usage of the ...

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.

MySQL

How to Test MySQL Server Hostname with ProxySQL Multiplexing

Overview While working on a MySQL Galera cluster with ProxySQL, I was in the process of testing traffic going to the ...

MySQL

How to solve SELinux and MySQL log rotation issue

Disable SELinux? Think again! SELinux is always a complicated topic. If you search this on the web, most people will ...

Oracle

Exadata Smart Scan: A Quick Overview

Introduction I decided to write about Exadata Smart Scan feature for this blog post. Why Smart Scan? Well, because it ...

Oracle

How to Find Clusterware Configuration Details Using srvctl

At times, you may be required to gather information about Oracle Clusterware configuration details. Instead of running ...

Oracle

How to Reduce Exadata Core Count

During preparation for a client's datacenter migration, we decided to move services one-by-one to the datacenter / ...

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 work around OMS 12.1.0.3 error: Metric evaluation error start – Get dynamic property error

Background Have you received this error on OMS 12.1.0.3? "Metric evaluation error start – Get dynamic property error," ...

Oracle

Minimal Networking Knowledge Recommended for DBAs

In a recent post, I summarized what I consider to be the minimal topics one should be familiar with in order to do ...

Oracle

How To Fix ASM Disk Header Status from "FORMER" To "MEMBER"

I made an error when creating an Oracle ASM disk group which resulted in not being able to drop or mount the disk group ...

Microsoft SQL Server

How to Fix: The Selected Subscriber does not satisfy the minimum version compatibility

Problem: You are trying to add a new subscriber to a SQL Server Publication using the SQL Server Management Studio and ...

Oracle

Issues and workarounds for Exadata Patching

This post describes some of the most recent issues I have faced while patching an Oracle database machine (Exadata). ...

Oracle

How To Reclaim ASM Disks

The project I have been working on is migrating GoldenGate trails from DBFS and ACFS. Now that the migration has ...

Oracle

How to extend the /u01 filesystem on an Exadata

Marketers are very good at selling everyone on the fact that resources (CPU, disks, memory) are now infinite, which is ...

Oracle

How to Prevent Linux 7 Housekeeping from Breaking Oracle

Linux 7 introduced multiple changes and enhancements to the kernel. Among them was automated housekeeping for temporary ...

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 manage Oracle Flashback Log size

Here we will learn how to manage the size of flashback logs generated in our environment. This is useful especially ...

Oracle

Exadata: 7 Useful Commands to check Port/Sensor Alarms

Some days ago I was checking for the alarm below, with a very generic message: Message=The aggregate sensor ...

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

How to fix InfiniBand Error: Cable is present on Port "X" but it is polling for peer port

Facing an InfiniBand error? Let me guess: Ports 03, 05, 06, 08, 09 and 12 are alerting? You have a Quarter Rack? Have ...

Google Cloud

Comparing Pgpool-II and PgBouncer

While I was in the process of determining different HA solutions for PostgreSQL, Pgpool and PgBouncer both came into ...

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How to Set Up REPMGR with WITNESS for PostgreSQL 10

Oracle E-Business Suite and 12cR1 database in Extended support - What to do?

Troubleshooting Oracle Cloud Infrastructure Automatic Backups

Using rsync to Copy GoldenGate Trails from DBFS to ACFS

Why It's Good Practice to Run Datapatch -prereq after Creating Database

Using MDBUtil To Create Grid Infrastructure Management Repository Database

How to fix error when MySQL client fails to load SQL file with Blob data

Working with Ansible, PostgreSQL and Docker

ProxySQL configuration file & startup process explained

How To Resize Oracle ACFS Volume

How to Test MySQL Server Hostname with ProxySQL Multiplexing

How to solve SELinux and MySQL log rotation issue

Exadata Smart Scan: A Quick Overview

How to Find Clusterware Configuration Details Using srvctl

How to Reduce Exadata Core Count

How to delete an RAC Database Using DBCA silent mode

How to work around OMS 12.1.0.3 error: Metric evaluation error start – Get dynamic property error

Minimal Networking Knowledge Recommended for DBAs

How To Fix ASM Disk Header Status from "FORMER" To "MEMBER"

How to Fix: The Selected Subscriber does not satisfy the minimum version compatibility

Issues and workarounds for Exadata Patching

How To Reclaim ASM Disks

How to extend the /u01 filesystem on an Exadata

How to Prevent Linux 7 Housekeeping from Breaking Oracle

How To Delete MGMTDB and MGMTLSNR Using emcli

How to manage Oracle Flashback Log size

Exadata: 7 Useful Commands to check Port/Sensor Alarms

How to Find Cluster Resources Where Target!=State

How to fix InfiniBand Error: Cable is present on Port "X" but it is polling for peer port

Comparing Pgpool-II and PgBouncer

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