Postgres Covering Indexes and the Visibility Map

Covering indexes in Postgres came up in our weekly tech call because of a query optimization review one of the teams ...

OPatchAuto Bug on 19.3 GI/RDBMS When Patching to 19.6

Background

The other day I was doing a fresh install of Oracle 19.3. I ...

Background The other day I was doing a fresh install of Oracle 19.3. I was using the binaries from edelivery, doing ...

Setting up MySQL Monitoring With New Relic Infrastructure Pro

Intro If you have a New Relic Infrastructure Pro license, and unmonitored MySQL servers, there's now an easy solution ...

ProxySQL Query Rules: Notes From Production

Query Statspack's "SQL ordered by" Sections Over a Time Period

In this post, I'll present the statspack_top_sqls.sql script, which returns SQL performance statistics by mining the ...

Mining Statspack and AWR Repositories for Historical Trends

There are various ways that we can approach the analysis of a past database performance problem. The initial steps ...

Postgres Security Patches Related to the Search Path

There were some security patches released this month for Postgres, to put further restrictions on pathways that ...

Resolving Error ORA-28353: Failed to Open Wallet

Troubleshooting TDE wallet failures after october 2018 patching

Full ...

Troubleshooting TDE wallet failures after october 2018 patching Full disclosure: this is a post I've had in draft mode ...

PostgreSQL Backups

There are at least four ways to back up a Postgres database: SQL dump, filesystem snapshots, continuous archiving, and ...

Overcoming ORA-01722 Error While Doing an Upgrade With Different DST Versions

This will be a short entry, but hopefully, it will help if you face the error "ORA-01722: ...

This will be a short entry, but hopefully, it will help if you face the error "ORA-01722: invalid number" while doing ...

VPN Options with Azure: Azure to Site

As business entities move some of their services to Microsoft Azure Cloud (Azure), we see hybrid networks emerge that ...

Postgres partial indexes on email address domains

When I first heard of Postgres partial indexes, I knew immediately that this would have solved a problem I had in MySQL ...

Using SQLCODE Function

The idea of this post is to show how to handle errors using SQLCODE function. That function shows the code error for ...

The things I hate about Apache Cassandra

Intro First, let me start by saying I do not hate Cassandra. I love Cassandra. In its place, Cassandra is a powerful ...

Migrating SQL Server On-Premise to Azure SQL

Let’s revisit our options when moving your SQL Server workloads to Azure and check out ways to migrate on each of them. ...

Migrate Postgres Database from EC2 instance to RDS using AWS DMS (Data Migration Services)

In this post, we will explore one approach to Migrate PostgreSQL DB on EC2 instance to RDS instance using AWS Data ...

Cassandra Vulnerability - CVE-2020-13946 - Apache Cassandra RMI Rebind Vulnerability

On September 1, 2020, Apache disclosed a security vulnerability for Apache Cassandra. Summary: It's possible for a ...

CreateGoldImage Followup - Is CreateGoldImage Required for Cloning Oracle Home?

Comparing CreateGoldImage and Traditional Tar Cloning On October 31, 2019, I blogged about How To Use CreateGoldImage ...

Leading Through Crisis – What Ernest Shackleton Can Teach Us About the COVID Pandemic

In January 1915, polar explorer Ernest Shackleton’s ship became trapped in ice near Antarctica. For the next two years, ...

Management and Troubleshooting Features: Data Guard Command-Line Interface (DGMGRL) 19c

With Oracle Data Guard promising high availability, data protection and disaster recovery for enterprise data, it's ...

Exadata's InfiniBand Switch: Incorrect NTP settings Leading to Evictions, and Patching Recommendations

Overview This post describes a recent outage during a routine Exadata (X7-2) patching to the 19.2.12.0.0.200317 release ...

EM 13c: Patching Oracle Enterprise Manager With Release 4 Update 6 (13.4.0.6)

This week I had the opportunity to patch Oracle Enterprise Manager (EM) 13c with ...

This week I had the opportunity to patch Oracle Enterprise Manager (EM) 13c with Release 4, Update 6: RU6 (13.4.0.6). I ...

DBAs and the Cloud: Evolving Roles and New Challenges

The adoption of cloud services is soaring and causing an enormous shift in the role of DBAs. Depending on whether an ...